World number one Novak Djokovic will face Mats Moraing in the second round of the Belgrade Open on Tuesday.

Moraing, who is ranked 252 places below Djokovic, beat Egor Gerasimov 4-6 7-6 (9-7) 7-5 in a gruelling encounter on Monday.

Djokovic is seeking his 83rd Tour-level title as he warms up for the French Open, the main draw of which begins on May 30.

Fellow home favourite Dusan Lajovic, the highest seed to compete on day one, will meet Jeremy Chardy next after beating Ricardas Berankis in straight sets.

Eighth seed Federico Delbonis required three sets to see off Lukas Klein, while seventh seed Miomir Kecmanovic – another Serbian in the draw – was beaten 6-3 6-2 by Pablo Cuevas.

Veteran Fernando Verdasco set up a contest with Adrian Mannarino after an impressive 7-5 6-2 win over Lucas Pouille.

At the Emilia-Romagna Open in Parma, all of Monday's play had to be cancelled due to persistent rain.

Fifth seed Richard Gasquet is in action on Tuesday.

Rafael Nadal believes his ability to handle pressure was key to a record-extending 10th Internazionali d'Italia win on Sunday.

Nadal overcame Novak Djokovic 7-5 1-6 6-3 to seal his first Masters 1000 triumph of the year, while improving to 4-2 in the finals he has played against the Serbian at the Foro Italico venue in Rome.

Victory also gave Nadal a 36th Masters 1000 crown, moving him level with Djokovic's all-time record since the series was established in 1990.

The 34-year-old king of clay-court tennis was delighted to get his hands on the trophy for a 10th time and said there has been no let-up in his motivation to succeed.

"It's amazing to have the trophy with me again, one more time here in Rome," Nadal said.

"I really wanted this 10th here in Rome. After achieving 10 at Roland Garros, 10 in Monte Carlo, 10 in Barcelona, I really wanted this one. It's a super important tournament for me.

"I went through a lot of things during the week. Some positive, some great moments, some lucky moments, suffering moments. At the end I think I played a very solid week of tennis. It's the right moment to win an important title."

Nadal added, quoted on the ATP website: "I don't put extra pressure on myself at all. I want to win every day and every tournament that I play. But the passion and the motivation to try is always the same. I know how to handle the pressure."

Nadal plans to rest for a few days before making minor tweaks to his game ahead of a tilt at a record-breaking 21st grand slam title at the French Open, which starts on May 30.

"I'll take a couple of days off and then start working," Nadal added. "I think I can work on a couple of things that I can do a little bit better. I think I have been improving this week, but I need to keep going with those improvements, because when you improve, you're able to do it every day for a longer time.

"I just need to keep going. I know what I need to work on over the next couple of weeks, and I'm going to do it. Work, relax mentally, and work the right way."

Djokovic spent almost five hours on court on Saturday in his rain-delayed quarter-final against Stefanos Tsitsipas and subsequent semi-final triumph over Lorenzo Sonego.

However, he insisted fatigue was not behind his defeat.

"Not at all, I did not feel any fatigue," Djokovic said. "He managed to break my serve and played better, that's it.

"Until the last shot it was quite close. I had my shot to win it, but it wasn't meant to be. I didn't feel fatigue. Actually, I was very happy with the way I felt on the court. I could have gone for another few hours.

"I could have easily gone out of this tournament in the quarters. I'm very pleased with my fighting spirit. The level of tennis was higher and higher, actually.

"Yesterday I played great. Today I thought I also played at a high level. Unfortunately the decisive moments in the first and third sets just went his way. It was a bit unfortunate."

Rafael Nadal sealed a record-extending 10th Rome Masters title with a 7-5 1-6 6-3 win over Novak Djokovic at the Internazionali d'Italia.

It marked a first Masters 1000 triumph of the year for Nadal, who improved to 4-2 in the finals he has played against Djokovic at the Foro Italico venue.

Victory also secured Nadal a 36th Masters 1000 crown, moving him level with Djokovic's all-time record since the series was established in 1990.

Djokovic spent almost five hours on court on Saturday in his rain-delayed quarter-final against Stefanos Tsitsipas and subsequent semi-final triumph over Lorenzo Sonego, but he showed no signs of fatigue in the opening stages in Rome.

The Serbian broke in Nadal's first service game to go 2-0 up, although Spaniard Nadal hit back in the next game before levelling matters at 2-2.

Nadal then broke again, taking advantage of an unconvincing service game from Djokovic at 5-5 on his way to sealing the opening set in one hour and 15 minutes.

Djokovic survived a break point at 1-1 in the second set, before breaking Nadal in the next game to move 3-1 ahead.

The Serbian reeled off five games in a row in all, setting up set point with his fifth ace of the match. He forced a backhand error from Nadal to take the second set in 43 minutes.

Nadal saved two break points at 2-2 in the final set, which provided him with the confidence to break to love and open up a 4-2 lead.

He sealed victory in two hours and 50 minutes, converting his second championship point when Djokovic sent a backhand long.

Novak Djokovic dug deep in the face of fierce Roman resistance to set up a showdown with Rafael Nadal in the men's final at the Internazionali d'Italia.

World number one Djokovic came from a set down overnight to beat Stefanos Tsitsipas 4-6 7-5 7-5 early on Saturday, before returning to the court to face Italian Lorenzo Sonego in the evening.

The Rome crowd raucously rallied behind Sonego, who beat Andrey Rublev earlier in the day, and the 26-year-old rose to the challenge but eventually fell to a 6-3 6-7 (5-7) 6-2 defeat.

Djokovic had match points before serving for it at 6-5 in the second set, yet it was to prove a stirring game as the noisy home crowd encouraged Sonego, who snatched a gutsy break. The tie-break looked set to be wholly one-sided when Djokovic raced 3-0 ahead, but it was soon back on serve, partisan spectators at the Foro Italico roaring in delight at a double fault from the Serbian.

From 4-2 behind, Sonego surged to 6-4 ahead in the tie-break. He failed to convert a first set point when ripping a forehand into the net, but the set was his when Djokovic sent a backhand service return long.

Sonego then had 0-40 against the Djokovic serve at the start of the decider, but he could not force the break, and the top seed gained strength from that escape, eventually cruising to victory.

Five-time Rome champion Djokovic said on Amazon Prime: "I bounced back very well after the second set. Maybe if he started with a break up in the third, things would look differently. I also had my chances and I only had myself to blame for not closing the match in straight sets.

"But he's a quality player, very dynamic, it's not easy to play against him and obviously he had the crowd behind him. It was an electric atmosphere. In the end I managed to close out the match really well."

Looking ahead to tackling Nadal, Djokovic said: "I need to recover. Hopefully I'll have fresh legs because that's what I definitely will need and it's necessary to have a chance against Rafa. He also had some tough matches [this week] and hopefully I'll be fresh and I'll give it all."

While Djokovic and Sonego thrashed away into the night, nine-time champion Nadal had no such workload issues on Saturday.

Nadal beat Alexander Zverev on Friday to set up a semi-final against American Reilly Opelka, and the Spaniard snatched a 6-4 6-4 win from that contest to reach the title match.

Novak Djokovic had to battle back more than once before eventually getting the better of Stefanos Tsitsipas in Rome, keeping alive his hopes of a sixth Internazionali BNL d'Italia title.

The reigning champion was in trouble when play was halted in the quarter-final clash on Friday, trailing by a set and a break before persistent rain forced an early end to proceedings.

However, Djokovic was able to get back on level terms before the duo played out a see-saw deciding set that twice saw Tsitsipas hold control.

The sixth seed – seeking a first win over the world number one on clay at the third attempt – even had the chance to serve out for the match when 5-4 ahead, only to falter with the finishing line in sight.

Djokovic instead claimed three games in a row to finally prevail after three hours and 16 minutes on court. He has little time to recover, though, as his semi-final match is scheduled for later on Saturday.

Next up will be Italian Lorenzo Sonego, the home favourite having produced a comeback of his own to see off Andrey Rublev 3-6 6-4 6-3 in another contest held over from Friday.

Djokovic will hope for a more straightforward encounter after being pushed all the way by Tsitsipas, who will rue his missed chances.

The Greek led 2-1 in the final set after clinching a break that led to his opponent throwing his racket in frustration, earning him a code violation.

He had openings to extend that advantage in the fifth game before losing his serve in the eighth, only to quickly forge his way back in front to move to the brink.

Yet a gripping set of tennis that saw a combined total of 16 break-point opportunities somehow went Djokovic's way, a memorable victory wrapped up when Tsitsipas slashed a tired-looking backhand wide.

Novak Djokovic's Internazionali BNL d'Italia quarter-final with Stefanos Tsitsipas was halted by persistent rain on Friday with the world number one a set and a game down.

Reigning champion Djokovic, who is seeking a sixth triumph in Rome, struggled to get going against Tsitsipas and trails 6-4 2-1 ahead of the scheduled resumption of play on Saturday.

The top seed lost serve in the first game and continued to make some uncharacteristic errors that saw him trail 4-1 at one point.

While Djokovic did earn a first break in the sixth game, Tsitsipas stood firm to take the opening set and was in total control when again breaking his opponent early in the next set.

However, soon after the Greek had opened up a 2-1 advantage, the worsening conditions led to a pause in proceedings and organisers were eventually forced to bring the day's play to an end.

Djokovic, who converted just one of his six break point opportunities, will return to the court on Saturday and will need to improve if he is to join Rafael Nadal in the final four.

Nadal exacted some revenge on Alexander Zverev earlier on Friday to reach the semi-finals for a 12th time.

The Spaniard lost to Zverev at the same stage of the Madrid Open seven days ago but responded to questions over his form by easing through this latest encounter.

Nadal, who saved two match points before beating Denis Shapovalov on Thursday, raced 4-0 ahead in the first set against Zverev and had little trouble seeing the job through.

Aiming for a record-extending 10th title in the Italian capital, Nadal saved all eight break points he faced in the second set to advance 6-3 6-4 in two hours.

"I played more solid than Madrid. Conditions are different," he said in his post-match interview. "Here the conditions are a little more normal. I was able to control a little bit more."

"I'm happy. I played a very solid match with not many mistakes, playing the way that I have to. It's an important victory for me against a great player."

Nadal will face Reilly Opelka for a place in the final, the American beating qualifier Federico Delbonis 7-5 7-6 (7-2) to reach his first ATP Masters 1000 semi-final.

Opelka entered the tournament on a six-game losing streak, but he kept his good run going in Rome by earning the only break of the opening set in the 12th game.

Both players held throughout the second set and it was big-serving Opelka who prevailed 7-2 in the tie-break.

The day's other quarter-final between Lorenzo Sonego and Andrey Rublev also fell victim to the bad weather and will get under way on Saturday.

Novak Djokovic cruised into the quarter-finals of the Internazionali d'Italia with a straight-sets demolition of Alejandro Davidovich Fokina on Thursday.

The world number one took just an hour and 10 minutes to wrap up an emphatic 6-2 6-1 victory at the Foro Italico.

Davidovich Fokina broke the top seed's serve in the first game of the match, but that proved to be a false dawn for the Spanish qualifier.

Djokovic put the 21-year-old under huge pressure with another returning masterclass, breaking back immediately and on two more occasions to seal the first set.

The 18-time grand slam champion was relentless in the second set, forcing Davidovich Fokina's unforced error count up to 30 as he breezed into the last eight.

Djokovic, who has reached at least the quarter-final stage in each of his 15 appearances at the prestigious tournament in Rome, was waiting to learn whether he would face Stefanos Tsitsipas or Matteo Berrettini for a place in the semi-finals.

The Serbian said: "I thought I played well. He started well and broke my serve in the first game. I made some errors, but I managed to break back right away and establish the control and consistency on the court.

"I think from the back of the court I was just a bit more solid than him.

"He made some unforced errors and double faults in key moments, which obviously helped me get that necessary break forward.

"I thought I played better, at least 20 or 30 per cent better, than I did against [Taylor] Fritz a few days ago. I am on a good trajectory and hopefully tomorrow will be even better."

Novak Djokovic returned following a rain delay to beat Taylor Fritz in the second round of the Internazionali BNL d'Italia after Felix Auger-Aliassime dumped Diego Schwartzman out.

Djokovic, playing his first match since a shock loss to Aslan Karatsev in the semi-finals of the Serbia Open on home soil, dispatched American Fritz 6-3 7-6 (7-5) on Tuesday.

The world number one, who missed the Madrid Open, won the first three games of the match and saved both break points he faced in the opening set.

Fritz had broken for a second time in the second set to level at 5-5 when the rain came at the Foro Italico, but the top seed was able to come back out on court to finish off the job and will face Cameron Norrie or Alejandro Davidovich Fokina in the third round.

Auger-Aliassime secured the third victory over a top-10 opponent in his fledgling career, beating eighth seed Schwartzman 6-1 6-3 to move into round three.

The 20-year-old Canadian only needed 64 minutes to send the Argentine packing, converting five of the six break-point opportunities he earned.

Matteo Berrettini saw off Nikoloz Basilashvili 4-6 6-2 6-4 in the first round less than 48 hours after the Italian was beaten by Alexander Zverev in the Madrid Open final.

Gael Monfils was unable to win his first match since the Australian Open, as Lorenzo Sonego got the better of the fit-again Frenchman, who had been sidelined with a calf injury, 6-4 5-7 6-4.

Reilly Opelka moved into the last 16 with a 6-4 6-4 defeat of Lorenzo Musetti, while Pablo Carreno Busta's withdrawal due to lower back pain handed Kei Nishikori a walkover.

Daniil Medvedev and David Goffin were unable to start their second-round matches due to the weather in Rome.

Novak Djokovic and Rafael Nadal learned their round of 32 opponents after Monday's action at the Internazionali BNL d'Italia in Rome.

Taylor Fritz will be hoping for a first win over world number one Djokovic at the fourth attempt after recovering from 1-3 down in the first set to defeat Monte Carlo semi-finalist Dan Evans 6-3 6-2.

"We played twice on clay in 2018, in Monte-Carlo and Madrid," the American said, having bounced back from two down to take Djokovic to five sets in this year's Australian Open.

"I got beaten pretty bad those two times. I feel better prepared to play him now, after the match in Australia."

Italian teenager Jannik Sinner continued his superb form to set up a meeting with Nadal, a nine-time winner in the Italian capital.

Sinner dispatched Ugo Humbert 6-2 6-4 in 90 minutes for his 20th win of the season and will now look to improve upon a straight-sets loss to Nadal at Roland Garros last October.

World number 27 Aslan Karatsev matched Sinner's 2021 haul by overcoming Miomir Kecmanovic 7-6 (7-2) 6-4 and is up next for Daniil Medvedev.

Marin Cilic will take on fifth seed Stefanos Tsitsipas after battling to a 4-6 6-2 6-3 triumph over Alexander Bublik, while Andrey Rublev and Dominic Thiem – also the beneficiaries of byes – will face Jan-Lennard Struff and Marton Fucsovics respectively after their straight-sets wins over lucky losers Aljaz Bedene and Yoshihito Nishioka.

The most notable casualty in Monday's round one action was Hubert Hurkacz who, who retired at 6-4 2-0 down to Italian wildcard Lorenzo Musetti.

Andy Murray heads to Rome on Saturday with the drive to show there could be one last special summer in his career, and he has an early test against Novak Djokovic booked in.

Former world number one and 11-time grand slam finalist Murray has not played since the Rotterdam Open in early March, having been forced to pull out of the Miami Masters due to a groin injury.

Staying fit has been a problem for Murray since he required a hip resurfacing procedure in January 2019, to deal with a persistent problem that threatened his career.

He particularly wants to play Wimbledon and the Olympics this year, having won both events twice, and hopes to do so in good health.

The 33-year-old is waiting to learn whether he must go through qualifying for the French Open or if a wildcard awaits. He is not entered into the upcoming Internazionali d'Italia but will be in Rome all the same, working to get himself match-ready for the tests that lie ahead.

Murray said: "I want to get out there to be around the top players and top tournaments. On Sunday I've got a court booked with [Diego] Schwartzman and then Novak [Djokovic] in the afternoon.

"I want to play against the highest-level players possible because I think that will help me improve my game quicker."

Quoted in the British media on Saturday, Murray said: "I'm really looking forward to going away [on Saturday] and being among those guys and having a good few months this summer, with Wimbledon and the Olympics. I feel good right now."

Murray was ruled out of the Australian Open, which took place in February, after contracting COVID-19, and the groin injury in Miami was another major disappointment.

While he will be limited to the practice courts in Rome, Murray is aiming to fit in at least one tournament before the French Open, with Geneva and Lyon both staging events in the week ahead of Roland Garros qualifying.

"It's difficult for me to look too far into the future," said Murray, now down to 123rd in the ATP rankings. "I need to try and find a way of staying on the match court for longer. It has been extremely frustrating.

"When I had the operation on the hip I knew it was going to be unbelievably challenging. It just feels there are a couple of things that have happened this year which have been very unfortunate, that have been hard to take."

Defending champion Novak Djokovic has revealed he will not play in the Madrid Open next week.

The world number one on Wednesday announced he will not take his place in the draw at the Caja Magica, where he won the title for a third time two years ago by beating Stefanos Tsitsipas in the final.

Djokovic suffered a shock defeat to Aslan Karatsev in the semi-finals of the Serbia Open on home soil last week and the 18-time grand slam champion will not be adding to his list of honours in Madrid.

He stated: "Sorry that I won’t be able to travel to Madrid this year and meet all my fans.

"It's been two years already, quite a long time. Hope to see you all next year!"

Djokovic has won 12 times and been beaten twice this season, claiming a ninth Australian Open crown in February.

The Madrid Open was not staged last year due to the coronavirus pandemic.

World number one Novak Djokovic was full of praise for his Serbia Open semi-final conqueror Aslan Karatsev but bemoaned his own "low level" performance.

Karatsev got past Djokovic in the longest match of the 2021 ATP Tour in Belgrade, triumphing 7-5 4-6 6-4 on Saturday.

The match went for three hours and 25 minutes, with the Russian securing a spot in Sunday's final against 10th ranked Matteo Berrettini.

The Serbian had beaten Karatsev in the Australian Open semi-finals two months ago, with the 27-year-old Russian, who is now ranked 28th, returning the favour.

"From my side, I played on quite a low level, in my opinion," Djokovic said.

“[I had] some flashes of good quality tennis. I was fighting. That is a positive.

"I was really trying all the way [and] the crowd was great. They carried me and tried to lift me up, all the way to the end.

"Because of them, I think I won the second set. Unfortunately in the third, he was just the better player in the decisive moments. I had my chances, but that is sport."

Djokovic was gracious in defeat, offering a thumbs up immediately after Karatsev secured victory along with complimentary words to his opponent who saved 23 of 28 break points.

"Karatsev showed a lot of courage and that is why I gave him the thumbs up," Djokovic said.

"I felt like he deserved to win… Once the final point is done, there is never bad blood. We are rivals on the court, but I don’t hate anybody. I can’t be upset with him if he beat me.

"I have to be upset with myself and question why I lost the match. Whoever beats me deserves the credit and I gave him that.

"I lost to a better player who was just more courageous. He went for his shots at the right time and it worked for him."

Aslan Karatsev secured a stunning career-best victory over home favourite Novak Djokovic to set up a Serbia Open final against Matteo Berrettini.

Karatsev showed astonishing defiance to beat the world number one 7-5 4-6 6-4 in the longest ATP Tour match of the year on Saturday.

The third seed from Russia saved 23 of the 28 break points he faced as his aggressive approach paid off, toppling the 18-time grand slam champion in a contest that lasted three hours and 25 minutes.

It was sweet revenge for Karatsev, who was beaten by the legendary Serbian at the semi-final stage of the Australian Open two months ago.

Djokovic had won 11 matches in a row in his homeland, but bowed out despite being 2-0 up in the first two sets as a solitary break in the decider ended his run.

Karatsev, the world number 28, said: "It was a long, tough match [against a] tough opponent.

"You have to put [in] like 200 per cent to beat this guy, it's like playing against a wall. And he also made some good shots.

"He doesn't give you any free points. He always makes you play and you have to be always there because once you miss a couple of shots, he just takes it very quickly. That’s how I lost the second set."

Berrettini secured his place in the final with a 6-1 6-7 (5-7) 6-0 victory over lucky loser Taro Daniel.

Second seed Berrettini only lost six points in the last set after Daniel came from a break down in the second before winning a tie-break to take the second semi-final the distance.

Heading into Sunday's final, Karatsev and Berrettini have never previously faced each other on the ATP Tour.

Novak Djokovic thought he was "pretty flawless" in his first match of the Serbia Open, but Rafael Nadal was given a scare in his clash with qualifier Ilya Ivashka at the Barcelona Open.

World number one Djokovic suffered a shock third-round exit to Dan Evans at the Monte Carlo Masters last week but ruthlessly dispatched Kwon Soon-woo 6-1 6-3 in his home city of Belgrade.

Djokovic broke his opponent five times to set up a meeting with eighth seed and fellow Serbian Miomir Kecmanovic, who battled past qualifier Arthur Rinderknech in three sets, in the quarter-finals.

"I thought it was a pretty flawless performance," Djokovic said. "I moved well, I was mixing up the pace quite well, making him play. I served well in the important moments, [and] overall I just felt great."

On playing in front of his family and friends, the two-time Serbia Open champion added: "It gives you an extra push, an extra motivation, energy to really give your best and leave it all out on the court.

"I think also that made me feel comfortable and confident on the court and I played really good. I'm really pleased with the quality of tennis."

Second seed Matteo Berrettini defeated fellow Italian Marco Cecchinato 6-4 6-3 and will face either Filip Krajinovic or Nikola Milojevic in the last eight of the clay-court tournament.

Over in Barcelona, Nadal – an 11-time champion at the event – was out to make a statement after a rare defeat on the dirt to Andrey Rublev in Monte Carlo.

But the 'King of Clay' needed two hours and 20 minutes to fight back against the unheralded Ivashka 3-6 6-2 6-4 to reach the round of 16, where he will face Kei Nishikori. Nadal is now 62-4 at a tournament where he once won 41 straight matches.

Second seed and Monte Carlo champion Stefanos Tsitsipas hammered Jaume Munar 6-0 6-2, while third seed Rublev - runner-up to the Greek on Sunday - joined Pablo Carreno Busta (6) and Alex De Minaur (14) in making it through.

Evans was unable to follow up his run in Monte Carlo with the 16th seed beaten by Corentin Moutet in a lengthy three-setter, while Fabio Fognini (9) was defaulted for unsportsmanlike conduct after verbally abusing a line official when trailing 6-4 4-4 to Spanish qualifier Bernabe Zapata Miralles.

Jannik Sinner set up a clash with Roberto Bautista Agut at the Barcelona Open as he vowed to keep making progress after cracking the top 20 for the first time.

Italian 19-year-old Sinner is a fast-rising new star of the men's game and now has a ranking to match his age. However, he was put in his place by Novak Djokovic last week in Monte Carlo, before the world number one was himself dealt a jolting defeat by Dan Evans.

Sinner sped past Belarusian Egor Gerasimov in the first round in Barcelona on Tuesday, winning 6-3 6-2, and it will be wily world number 11 Bautista Agut who stands in his way of going deeper into the tournament.

In two meetings on hard courts this season, Sinner has edged out 33-year-old Spaniard Bautista Agut in tight deciding sets, and now they face a reunion on clay.

"He lost in Dubai against me, he lost in Miami against me, now we play once more here, so it's quite a small period of time," said Sinner.

"We're playing now our third match already, so it's going to be a very tough match. He is very, very solid. I never played against him on clay. I'm trying to be ready in the best possible way."

Bautista Agut barged past fellow Spanish player Pablo Andujar, scoring a 6-4 6-0 win.

Sinner was proud to enter the ATP top 20 this week but sees it as just a step on his journey, saying: "Obviously it's a good number, but for me at the moment not that important."

He added, quoted on the ATP website: "[I'm] just trying to improve day after day with my team and trying to improve as a player and the ranking is what it is. I'm happy to be top 20 player but the road is long so a lot of work to do."

Albert Ramos-Vinolas, Lorenzo Musetti and Frances Tiafoe, who fought off 17-year-old Spanish prospect Carlos Alcaraz, were also among Tuesday's winners in Barcelona.

Star turn Djokovic begins his campaign at the Serbia Open on Wednesday when he tackles Kwon Soon-woo, with the 18-time grand slam winner having received a first-round bye.

Tuesday's play in Belgrade saw wins for, among others, Federico Delbonis, Aljaz Bedene and Miomir Kecmanovic.