Bayern Munich shocked the Bundesliga by making a dramatic change in the dugout, replacing Julian Nagelsmann with Thomas Tuchel.

The decision came with Borussia Dortmund posing a serious threat to Bayern's hopes of an 11th consecutive league title.

Tuchel arrives with Bayern sitting one point off the Bundesliga summit and through to the Champions League quarter-finals, with the former BVB and Chelsea boss facing several pressing tasks.

Fending off his former club's challenge for domestic glory and plotting a route past Pep Guardiola's Manchester City will be among the immediate concerns, but there are others requiring Tuchel's attention.

From the futures of club stalwarts Manuel Neuer and Thomas Muller, to the need to suitably replace Robert Lewandowski, there will be plenty to keep Tuchel occupied until the end of the season and beyond.

Here, Stats Perform looks at five of the most pressing tasks facing Tuchel on his return to Germany.

Fix Bayern's sloppy backline

While Bayern boast the Bundesliga's best defensive record with 27 goals conceded this term, Tuchel – who was successful in making Chelsea tough to beat in his last managerial assignment – will be keen to examine a series of shortcomings at the back.

Having beaten Augsburg 5-3 in Nagelsmann's penultimate game at the helm, Bayern suffered a damaging 2-1 defeat at Bayer Leverkusen last time out, with Benjamin Pavard and Dayot Upamecano clumsily conceding a pair of second-half penalties.

With Nagelsmann known for employing a high defensive line and adopting an aggressive approach, Bayern have often appeared too open this campaign.

Of the Bundesliga-high 13 errors leading to shots made by Bayern players this season, three have resulted in goals, while last year's big-money recruit Matthijs de Ligt is yet to establish himself as a dominant defensive presence.

Tuchel's Chelsea kept five clean sheets in seven Champions League knockout games en route to being crowned European champions in 2021 – he will be confident of having a similar impact in his new job, given the defensive talent at his disposal.

Make crucial Neuer decision

The most controversial incident in Bayern's season before the change of coach came in January, when captain Neuer hit out at the club's decision to fire close friend and goalkeeping coach Toni Tapalovic.

Those comments were met with a furious reaction from the club's hierarchy, throwing Neuer's future in Munich into doubt.

A series of injuries – the latest a broken leg sustained during a skiing holiday – have limited Neuer to 16 appearances across all competitions this term, and with Yann Sommer's arrival giving Bayern two top-class goalkeepers to choose from, Tuchel has a decision to make.

While Neuer boasts a better save percentage (75.44 per cent) than Sommer (64.1) for Bayern this term, the 2014 World Cup winner will be 37 by the time he returns to fitness, and there may not be room for both shot-stoppers in Bayern's long-term plans.

Find Lewandowski's successor

No discussion of Bayern's inconsistent season would be complete without a mention of their failure to find an adequate replacement for goal machine Lewandowski.

Lewandowski left for Barcelona last year, having led the Bundesliga's scoring charts in six of his eight seasons with Bayern (2015–16, 2017–18, 2018–19, 2019–20, 2020–21 and 2021–22).

The Poland international hit 35 goals in as many league appearances in his final season with the Bavarian giants. This term, Jamal Musiala is their top Bundesliga marksman with 11 goals, one ahead of Eric Maxim Choupo-Moting.

While having five separate players on double figures across all competitions this term is no bad thing (Choupo-Moting, Musiala, Leroy Sane, Serge Gnabry and Sadio Mane), an established successor to Lewandowski is surely required.

Solve the Mane conundrum

On a related note, getting the best of last year's marquee arrival Mane will also be high on Tuchel's to-do list, with the Senegal attacker yet to hit the heights he reached at Liverpool.

Injuries and mixed form have meant Mane has started just 14 of Bayern's 25 league games, failing to net in any competition since a 6-2 win over Mainz in October.

Tuchel's previous success with a fluid forward line could bode well for Mane. In his only full Premier League campaign with Chelsea, the Blues were only outscored by Manchester City and Liverpool, with a plethora of players chipping in as the returning Romelu Lukaku fell out of favour.

Examine Muller's role

While the acquisition of a centre-forward will surely be at the forefront of Bayern's plans at the end of the season, the Bavarians' chances of short-term success could hinge on finding a regular role for Muller.

Muller, who became Bayern's all-time leading outfield appearance maker in the Bundesliga last month, has started just 14 league games this campaign, but his tally of 11 goal contributions (four goals, seven assists) in just 1,062 minutes demonstrates his lasting quality.

With Nagelsmann alternating between 4-2-3-1 and 3-5-2 shapes in recent weeks, Muller has featured in a number 10 role – where he previously thrived under Hansi Flick – and in a front two.

With high-stakes clashes against Dortmund and City on the horizon, Tuchel's first month at the helm could prove decisive, and finding a place for the experienced Muller could help the new boss make a flying start.

Bayern Munich were indebted to Matthijs de Ligt's heroics against Paris Saint-Germain and Yann Sommer offered the centre-back a sweet reward for his pivotal Champions League intervention.

Julian Nagelsmann's side recorded a 3-0 aggregate triumph in the last-16 on Wednesday after Eric Maxim Choupo-Moting and Serge Gnabry secured a 2-0 second-leg triumph at Allianz Arena.

However, PSG should have twice restored parity in the tie in the first half as Alphonso Davies thwarted Lionel Messi from close range before De Ligt cleared off the line with Vitinha firing at an open goal.

The latter chance came from an inexplicable Sommer error as he squandered possession inside his own area and the goalkeeper joked a deserved treat will await for De Ligt's last-ditch efforts.

"I will leave a truck filled with Swiss chocolate on his doorstep!," Sommer said on DAZN, before attempting to explain his error.

"The problem was, I had my solution to pass to [Josip] Stanisic but it was closed, then I had no more solution," he added.

"It was unbelievable what De Ligt was doing there, of course, I'm not happy with [my part] in the scene. 

"It's amazing how he thinks and saves me. If that goes wrong, then this game looks very different."

De Ligt's hooked clearance at full stretch proved the difference as Bayern kept a fourth straight clean sheet in the Champions League, their longest run in the competition without conceding.

While Sommer hailed his centre-back team-mate, Gianluigi Donnarumma was left to rue a "disappointing" performance as PSG were dumped out at the last-16 stage in Europe for a second straight term.

"There's a lot of disappointment in the dressing room," the Italy international told Canal Plus. 

"In the Champions League, the small details make the difference. We could have done better in the first half, we didn't. We're all annoyed and disappointed."

Sadio Mane will return to Bayern Munich training on Sunday having missed three months with a fibula injury, but fellow forward Kingsley Coman will miss Saturday's trip to Borussia Monchengladbach.

Mane missed Senegal's run to the last 16 of the World Cup in Qatar after being required to undergo surgery in November.

Last month, coach Julian Nagelsmann suggested the former Liverpool man could be fit to feature in Bayern's Champions League last-16 tie against Paris Saint-Germain, but he was not involved as the Bundesliga champions claimed a 1-0 first-leg lead in the French capital on Tuesday.

Mane is making progress in his recovery, though, and Nagelsmann believes heck could be involved in a matchday squad after as little as one week of full training.

"He will return to team training on Sunday," Nagelsmann said of Mane on Friday. "He doesn't have any problems anymore, and his rehab was built to give him a regular workload.

"He has to get back his technical and tactical feelings with the team, but he's experienced, and he will be back rather quickly.

"Theoretically, he could play again after being back in team training for a week."

Having Mane involved again will be a huge boost for the Bundesliga leaders, who take on second-placed Union Berlin after facing Monchengladbach.

However, Bayern will be without Coman at Borussia-Park on Saturday, with the Frenchman complaining of a calf issue after scoring the only goal of the game against former club PSG.

"Kingsley Coman will not be available, he will get back to practice at the start of next week," Nagelsmann said. "Serge Gnabry will play tomorrow. He played a lot before Christmas and scored a lot. 

"You need a good first XI that suits the opponent, but you also need good players that you can add to the mix. It always has to be a good balance."

Bayern's meeting with Gladbach will see goalkeeper Yann Sommer reunited with his former club, having made the move to Bavaria to cover for the injured Manuel Neuer in January.

"I'm very happy with his overall game. Against Paris, he was really called upon dramatically," Nagelsmann said of Sommer, who has kept three clean sheets in his last four games for Bayern.

"The goals he conceded in the Bundesliga were not easy. With the ball, with his presence, he's a really important part of the team. 

"It will be a special game for him, against his former club. They will say farewell to him ahead of this game, and it will be a special moment, but he's not 18 years of age, so he will be able to put that aside and deliver a strong performance."

Manuel Neuer backed Yann Sommer to succeed at Bayern Munich but questioned the dismissal of their goalkeeping coach after his freak skiing injury.

Germany veteran Neuer suffered a season-ending injury to his lower right leg in a fall in December.

The 36-year-old subsequently underwent surgery, with the setback coming just days after Germany tumbled out of the World Cup in the group stage.

Bayern searched frantically to replace their star goalkeeper in the January transfer window, eventually bringing in Sommer from Borussia Monchengladbach in a deal Neuer has "no problem at all" with.

He told The Athletic: "I put up a picture in our WhatsApp group and apologised. I also called the people in charge, apologised to them and said I'm sorry.

"I'm not a coward who goes into hiding. I explained everything to them, including the background.

"It created a lot of work for the people who run the club and that I might have harmed the team, yes. I didn't want that. I'm the happiest person when Sven Ulreich does well, as he always has done when he stood in for me.

"When Yann was brought in, I told the bosses I had no problem at all with that. I think it's good we have two great goalkeepers. I'm a team player. It's important to me what happens at Bayern.

"I look at the overall picture I don't just think of me and my pain and so on. I have a vocation, I have a job.

"I'm an important part of the team and also an important part of the club and I want the club and the team to be as successful as possible. That's the most important thing to me.

"I've known Yann for a long time and know that he's a good guy – and a good goalkeeper. The club found a great solution. It was important to me that there's someone there and that I don't have to worry."

While Sommer eased Julian Nagelsmann's goalkeeping fears, Bayern dismissed Neuer's long-time coach Toni Tapalovic.

"That blow hit me extremely hard," Neuer added. "Toni was always a team player with us, everyone saw it that way.

"He wasn't working for me for eleven and a half years, but for the entire goalkeeper group, for the coaching staff and for the club.

"We were always able to separate work and private life. I understand that it might sound like I'm not being objective or not believable, but I can really tell the difference.

"For me, that was a blow – when I was already down on the ground. I felt like my heart was being ripped out. It was the most brutal thing I've experienced in my career. And I've experienced a lot."

Bayern sit a point clear of Union Berlin at the Bundesliga summit ahead of Sunday's visit to Wolfsburg.

Bayern Munich's honorary president Uli Hoeness has urged patience with the club's long-term goalkeeping situation.

Manuel Neuer's leg break forced the Bundesliga leaders to be active in the January market, signing Yann Sommer from Borussia Monchengladbach on a two-and-a-half-year deal for a reported €8million.

While that deal solves the goalkeeping conundrum for the remainder of the campaign, it leaves questions for next season and beyond given the ages of both goalkeepers.

Neuer, 36, and Sommer, 34, are both experienced enough to want regular first-team action and the situation is complicated further by Alexander Nubel, who will return from a loan spell with Monaco, while Sven Ulreich is also on the books.

The quartet will give Julian Nagelsmann a selection headache next term but Hoeness believes it is a problem that can be solved further down the line.

"I think it's strange that the problems of June are discussed in January," he told Sport1.

"It was necessary to find the best solution for the next six months. Yann Sommer is the optimal solution at the moment.

#RBLFCB 0-0 (20') pic.twitter.com/10zs9vIjOM

— FC Bayern Munich (@FCBayernEN) January 20, 2023

"Everything else with Nubel and Ulreich will be seen in June when we know more about Manuel's condition.

"Bayern are happy to have a goalkeeper in Yann Sommer who is now solving our problems. I would urge patience."

While there have been questions on whether Neuer could have to pay a penalty due to his injury, which was caused by a skiing accident, Hoeness rebuffed those suggestions with a blunt response.

"Manuel knows he made a mistake. Anything can happen in life. It's an accident. We shouldn't forget what he did for Bayern," he added.

"Bayern's success is also due to the fact that such issues are solved very humanely and socially. A million or two doesn't matter. People come before money."

Marco Rose joked Yann Sommer would have snubbed a move to Bayern Munich in order to reunite with him at RB Leipzig if he had only asked.

The goalkeeper made the switch to the Bundesliga champions from Borussia Monchengladbach on Thursday after almost a decade at Borussia-Park.

He arrives to replace the injured Manuel Neuer and could slot straight into the starting line-up for Bayern's league match with Leipzig on Friday.

Rose, who coached Gladbach for a two-year period between 2019 and 2021, quipped that Sommer could have made the move to another destination if he had intervened.

"He called me and said 'if you don't take me, I'll go to Bayern'," he said. "I hold Yann in very high regard, as a person but also as a player.

"I think he's had an outstanding phase [of form]. I think he's a good signing for Bayern Munich. [But] I think that Sven Ulreich is an excellent goalkeeper who has also done well.

"There will be a good goalkeeper in goal [whoever it is]. Yann, I wish all the best of course."

Sommer made 272 Bundesliga appearances for Gladbach following his arrival in 2014, and enjoyed a 71.1 save percentage among goalkeepers with more than 10 league games.

He has the second-best figures in the division this term, with 77.1 per cent, behind only the 79.1 figure posted by Union Berlin's Frederik Ronnow.

Sommer is the second new face to arrive at Bayern this transfer window, following Daley Blind from Ajax.

Gladbach moved quickly by announcing fellow Switzerland international Jonas Omlin as Sommer's successor on Thursday.

Borussia Monchengladbach have moved fast to bring in a replacement for Yann Sommer after confirming the signing of Jonas Omlin from Montpellier.

Sommer's eight-and-a-half-year stint with Gladbach came to an end on Thursday when joining Bayern Munich for a fee reported to be in the region of €8million.

Gladbach have turned to fellow Switzerland international Omlin, who made 74 appearances for Montpellier after joining from Basel in August 2020.

The 29-year-old, who earned the most recent of his four Swiss caps last June, has signed a deal at Borussia-Park that runs through until July 2025.

"We believe we have found a very good solution by signing Jonas Omlin," Gladbach sporting director Roland Virkus told the club's official website upon confirmation of the transfer. 

"He is a very reliable goalkeeper who exudes confidence, is strong on his line and is good with the ball at his feet."

Omlin appeared in 14 of Montpellier's 19 games this season, keeping three clean sheets.

Yann Sommer has joined Bayern Munich from fellow Bundesliga side Borussia Monchengladbach.

Sommer, a Switzerland international, has regularly been one of the best-performing goalkeepers in Germany during his time at Gladbach.

The 34-year-old, whose contract was due to expire at the end of the season, has joined Bayern on a two-and-a-half-year deal for a fee reported to be in the region of €8million.

Bayern wanted to add to their goalkeeper options after Manuel Neuer was ruled out for the rest of the season having broken his leg while skiing in December.

The possibility of recalling Alexander Nubel from his loan at Monaco had been explored, though Sommer always seemed to be the priority target.

Despite Gladbach's insistence they did not wish to sell him, Sommer reportedly asked to leave, and a deal was struck between the clubs on Wednesday.

"I'm really looking forward to my new role at Bayern. It's a big club with power, we've often played against each other - I know about the enormous quality and charisma of this club," Sommer said on his transfer.

"I'm proud to be part of Bayern now. We have big tasks ahead of us. I'm really looking forward to the start with my new colleagues and to everything that's coming.

"I would like to thank Borussia Monchengladbach for eight and a half great years and for making this transfer possible."

Sommer joined Gladbach in 2014 and made 272 Bundesliga appearances. Hoffenheim's Oliver Baumann is the only goalkeeper to have played more times in the competition in the same period.

Of goalkeepers to make 10 or more Bundesliga appearances in that time, Sommer's save percentage of 71.1 is the seventh best and ranks similarly to Neuer's (72.5). He has kept 70 clean sheets.

Sommer has only made 10 appearances in the competition this season but boasts the second-best save percentage (77.1) behind Union Berlin's Frederik Ronnow (79.1).

Based on Opta's expected goals on target conceded (xGOT) data, Sommer's saves have prevented 4.1 goals in the Bundesliga this season, the highest figure in the division, with Neuer ranked second (3.8).

Bayern restart their campaign against Julian Nagelsmann's former team RB Leipzig on Friday.

Memphis Depay has been linked with a move away from Barcelona, having had a frustrating 2022-23 season.

The Dutchman has only made a handful of appearances for the Blaugrana, following an off-season of busy transfer activity at Camp Nou.

Depay had been linked with several clubs, including Premier League outfits Manchester United, Arsenal, Newcastle United and Tottenham.

TOP STORY – MEMPHIS TO EXIT BARCELONA FOR ATLETICO

Depay will leave Barcelona to join Atletico Madrid with an agreement reached on a fee of approximately €3-4million, reports Fabrizio Romano.

The Dutch forward is set to travel to Madrid to complete the formalities and medicals soon.

According to Romano, the 28-year-old will sign a two-and-a-half-year deal with Atleti.

ROUND-UP

– Fabrizio Romano claims Borussia Monchengladbach goalkeeper Yann Sommer will undergo medical tests with Bayern Munich on Thursday, before signing his contract with the Bavarians with the deal done between the clubs.

– Sky Sport Italia claims Roma are willing to sell Nicolo Zaniolo in January at the right price, approximately €40m, as the likes of Tottenham, Arsenal, West Ham United  and Borussia Dortmund circle.

– Real Madrid are interested in Manchester United's Alejandro Garnacho but the Red Devils have made an improved contract offer for the Argentinian, reports The Independent.

– Arsenal are happy to wait until the end of the season to pursue West Ham's Declan Rice, after missing out on Mykhaylo Mudryk, claims The Sun.

– Tottenham have made a first bid for Sporting right-back Pedro Porro, which included a player plus guaranteed money, but the Portuguese club have turned this down, according to Fabrizio Romano. Sporting want €45m (£39m) with talks ongoing.

– Chris Wood is on the cusp of joining Nottingham Forest on loan from Newcastle United, reports The Athletic. The deal would include an option to make the move permanent.

– West Ham tabled an offer for Aston Villa forward Danny Ings, reports The Telegraph.

Julian Nagelsmann is anxious to see Bayern Munich's pursuit of Yann Sommer reach a conclusion as the Bundesliga champions prepare to return to action at RB Leipzig on Friday.

Bayern have been strongly linked with Borussia Monchengladbach goalkeeper Sommer since Manuel Neuer broke his leg during a skiing trip last month.

With Sven Ulreich the only other senior goalkeeper in Bayern's squad and Alexander Nubel reportedly reluctant to return from a loan spell at Monaco, Nagelsmann said the club has "a duty" to sign another shot-stopper last week.

Bayern chief executive Oliver Kahn has revealed discussions are ongoing regarding a move for Sommer, and Nagelsmann is eager for the transfer saga to reach a resolution. 

"I've been a coach long enough to know it's never easy. There are always more than two parties that need to be satisfied," Nagelsmann said at Wednesday's pre-match press conference.

"We need a decision to happen. I'd like to change the transfer window so it doesn't affect the ongoing matches as much.

"It's normal that at some point you want to have a certain amount of peace and quiet in this position.

"Integrating a new goalkeeper is not rocket science. This usually takes about 15 minutes, it works quickly. It depends on the goalkeeper, generally the behaviour is very similar."

With Sommer having 272 Bundesliga appearances to his name, some have suggested his arrival could mark the end of Neuer's time as Bayern's number one, but Nagelsmann remains focused on the immediate need for reinforcements.

"It's more a matter for the people further up," Nagelsmann said. "I might have some things to say on that, but my business is day-to-day business, winning games.

"I assume that Manuel Neuer, a great goalkeeper, will come back in the summer. We're looking forward to a player of his quality returning."

Meanwhile, Nagelsmann is yet to decide whether Thomas Muller will see off competition from Eric Maxim Choupo-Moting to start as Bayern's striker against Leipzig, saying he is comfortable using the 33-year-old in a variety of positions.

"Thomas had an injury where he couldn't play as much in the first part of the season. Thomas is an extremely important player for me, I'm always exchanging with him," Nagelsmann said.

"He's aware that Choupo-Moting is doing very well, but he's also intelligent enough to know that he is world-class in several positions.

"It's important that all the players are in top condition and that we see that on Friday. The same goes for Thomas, he's very flexible. He likes to play in attacking midfield but can play in different areas, so he's going to be important for Bayern going forward. 

"I've already decided on six positions out of 11. I won't reveal whether Choupo-Moting is among the six. I'll sleep on it for two more nights."

Bayern Munich "have a duty to get another goalkeeper" in the current transfer window, according to head coach Julian Nagelsmann.

The German giants have been put in a tricky situation after Manuel Neuer suffered a broken leg during a skiing trip, leaving 34-year-old back-up Sven Ulreich as their only experienced option between the sticks.

Behind Ulreich is 19-year-old Johannes Schenk, and Nagelsmann made it clear he is looking for a more established veteran to challenge Ulreich for the number one spot in Neuer's absence.

However, he highlighted to reporters on Thursday why it is such a difficult proposition mid-season.

"In winter it is very, very difficult," he said. "The market situation is complex because other clubs are also looking for certain positions. 

"The goalkeeping market is generally complex – there aren't that many players out there. The situation is not easy.

"We're trying to do something. We have a duty to get another goalkeeper, regardless of whether he becomes number one or number two, because behind [Ulreich] we only have very young players. 

"If [Ulreich] were to get injured, it would be a complex situation for a young player with no professional experience to be between the posts. I'm a friend of always keeping your eyes and ears open."

When asked about Bayern's links to 34-year-old Borussia Monchengladbach goalkeeper Yann Sommer, Nagelsmann suggested there has been little progress.

"It's like I said before, it's kind of normal the way things are going," he said. "There is no club that likes to give away their goalkeeper. 

"There are few goalkeepers on the market that make sense for us and improve us. Nothing new at the moment."

Matthijs de Ligt is hoping Bayern Munich land their goalkeeper target as they chase Yann Sommer to plug the gap left by injured captain Manuel Neuer.

Defender De Ligt said it "would be nice" to have a new number one in place as 10-in-a-row German champions Bayern prepare for a fresh trophy push in the second half of the season.

Neuer's broken leg, which he suffered during a skiing accident, has thrown a curveball Bayern's way, with the club unexpectedly having to consider the goalkeeping position.

Swiss shot-stopper Sommer, 34, is out of contract at the end of June. He has keen admirers at Bayern, but Borussia Monchengladbach sporting director Roland Virkus indicated his club were not willing to negotiate a sale.

Bayern head coach Julian Nagelsmann hinted that was perhaps posturing on Gladbach's behalf, and three weeks remain in the transfer window to get a deal done.

Asked about the Sommer situation, De Ligt said on Tuesday: "It's difficult for me to say. Manuel is now out for half a year, and of course that's not good for the club.

"But it's not my job to say which goalkeeper we should buy. It would be nice to have a new goalkeeper on the pitch, but I can't influence that."

Bayern have Neuer's understudy Sven Ulreich as an option, but they look certain to bring in a goalkeeper before the window closes, whether that is Sommer or not.

Away with Bayern this week at a Doha training camp, De Ligt is delighted Bayern have brought in his Netherlands team-mate Daley Blind, following the defender's release by Ajax.

Blind arrived on a free transfer last week, in a surprise move that De Ligt is convinced can prove a shrewd piece of business for the Bundesliga leaders.

The 32-year-old Blind played at the World Cup for his country, and De Ligt said: "He's a very good player. With his experience, he can have very good games for us and help us."

Julian Nagelsmann is not worried by Borussia Monchengladbach's declaration that Yann Sommer is not for sale.

Bundesliga leaders Bayern Munich have a goalkeeping conundrum to solve ahead of the season's resumption later this month, after Manuel Neuer suffered a broken leg during a skiing accident.

Sommer, who is out of contract in June, has been touted as a candidate to be drafted in to fill Neuer's void, though Gladbach's sporting director Roland Virkus made it clear that the club were not willing to negotiate a sale.

Nagelsmann is not concerned, however, as he feels the comments are part and parcel of the mid-season window.

"I didn't faint at the headline," he said in a press conference when asked about Virkus' comments.

"If he had said the door was open, his board would also have asked him, 'is everything okay with you?' You have to keep your poker face."

Should a move for Sommer not materialise, another option for Bayern would be to recall Alexander Nubel from his loan at Monaco, though Nagelsmann claimed he has not spoken to the 26-year-old.

"I've never really had contact with him. He was already gone when I came, so he was never really my player," he explained.

"I know him as a goalkeeper, but not as a person. At the very beginning we texted, but that was a long time ago. It wouldn't do him much good if I picked up the phone."

Should a new addition not arrive in January, Nagelsmann is happy to call on long-time back-up goalkeeper Sven Ulreich.

Nagelsmann said: "Ulreich played some great games in the first half of the season. He was very solid. That is also the case in training.

"He had a small mistake. Ulle is very relaxed and has known his role for years."

Bayern resume their push for an 11th consecutive Bundesliga title on January 20 against RB Leipzig.

Yann Sommer will not be sold to Bayern Munich, with Borussia Monchengladbach sporting director Roland Virkus vowing to keep the Switzerland international despite transfer speculation.

The Bundesliga champions are in the market for a new goalkeeper after first-choice Manuel Neuer sustained a season-ending injury on holiday following the World Cup.

Sommer has been touted as a possible replacement, with Bayern sporting director Hasan Salihamidzic confirming their interest earlier this week.

Now though, Virkus has bluntly stressed there will be no exit to the Bavarian giants for the shotstopper – whose contract expires in June – during the January transfer window.

"We will not be giving up Yann Sommer," he said following Borussia's friendly against Oldenburg.

"That is what we told Bayern as well. It is planned that he will be used in the last two friendlies."

Virkus' words strike a sharp contrast to those of Salihamidzic, who confirmed interest in Sommer on Friday, though he walked back his comments to an extent at a subsequent press conference.

Neuer was ruled out for the remainder of the campaign after he was involved in a skiing accident in the wake of Germany's dismal World Cup campaign.

It has left Bayern with Sven Ulreich and 19-year-old Johannes Schenk as their goalkeeping options, leading the club to intensify a search for reinforcements.

The champions are top of the Bundesliga, four points ahead of Freiburg, and remain on course to defend their crown when the season restarts later this month.

Bayern Munich ruled out rushing through a deal for a new goalkeeper as Yann Sommer emerged as a prime target to replace the injured Manuel Neuer.

The 34-year-old Sommer has a contract with Borussia Monchengladbach that runs to the end of this season.

Bayern are weighing up a bid before the January transfer window closes, but they are away in Doha at a training camp for now, so nothing appears imminent.

Sporting director Hasan Salihamidzic spoke at a press conference in the Qatari city on Saturday, where he said efforts were under way to resolve the problem that arose when Neuer suffered a broken leg on a post-World Cup skiing holiday.

Having confirmed Bayern's interest in Switzerland international Sommer on Friday, Salihamidzic has now stressed a deal is not yet in place.

"As I said yesterday, I don't like to talk about other clubs' players," said the former Bayern defender. "The topic of the goalkeeper is of course one where we're thinking about it, but we're working on everything.

"Of course, Manuel's injury is a big blow for us. We're going to continue our work, check options, and then make a decision.

"We have until January 31 and until then we'll either do something or not."

The prospect of the goalkeeper issue going to the wire still appears unlikely, given Bayern resume their Bundesliga campaign on January 20 after the extended winter break.

Coach Julian Nagelsmann would ideally want the situation resolved by then, with there being seemingly little prospect of Alexander Nubel returning from his loan at Monaco.

Nubel has indicated a reluctance to come back, having become a regular in the Monaco team, and Salihamidzic says Bayern are aware of his stance.

"We have had very good communication between us, him and his management. We know exactly what the situation is," said the sporting director.

Bayern will be without defender Noussair Mazraoui for several weeks after announcing on Friday that medical tests had showed up an inflammation issue relating to his heart.

The Morocco international tested positive for COVID-19 at the World Cup, before recovering in time to face France in the semi-finals.

Subsequent tests have shown Mazraoui has a mild inflammation of the pericardium, which is the fluid-filled fibrous sac surrounding the heart.

Salihamidzic said it was unclear whether Mazraoui had been brought back too soon by Morocco.

"It's hard to tell if it was too early or not. He talked to [Morocco] medical staff, he talked to our medical staff, and he had tests. The tests were okay," Salihamidzic said.

"We don't know how it is with post-COVID. It's quite a blow for us that we have to be without him now.

"We'll talk about why this has happened to us. He's an important player for us, so we'll have to try to replace him.

"Of course he will be able to take all the time that he needs to recover. We'll have a test every week and see how he feels from week to week, but for now we're without him."