Leaders Leicester missed the chance to move clear at the top of the Championship as they suffered a shock 1-0 defeat away to relegation-threatened Plymouth, thanks to Mustapha Bundu’s 21st-minute winner.

Second-placed Ipswich remain level on points with the Foxes, with Leeds a point further back ahead of their games on Saturday with all three clubs currently having four matches left.

Managerless Argyle climbed to 16th on the back of their first home win in seven, under the caretaker management team of director of football Neil Dewsnip and first-team coach Kevin Nancekivell and now sit five points clear of the bottom three.

It only took five minutes for Leicester to test home goalkeeper Michael Cooper as Abdul Fatawu’s thumping right-footed shot – following a flowing move – forcing him into a diving save low down to his left.

Ricardo Pereira was next to test Cooper, following a defence-splitting one-two with Wilfred Ndidi. Again it was all diving Cooper could do to parry the ball away.

Stephy Mavididi latched on to the aerial ball and headed it back across the goal, which resulted in a goalmouth scramble and Argyle eventually clearing the ball.

Mavididi went close with a curling 13th-minute shot after being teed up by playmaker Kiernan Dewsbury-Hall on the edge of the box. The attacking midfielder’s shot beat Cooper for pace but flew just past the post.

Totally against the run of play, Plymouth stunned their visitors with a 21st-minute goal on the counter.

Adam Forshaw intercepted a Leicester attack and released recalled striker Bundu with a superb, measured pass through the middle of the park.

Bundu sprinted forward and – as he got into the penalty box – let fly with a fierce angled drive from the right that beat diving Mads Hermansen and rocketed into the far corner.

Harry Winks fired wide from 20 yards as Argyle failed to clear their lines following another City corner with the half-hour mark approaching.

Argyle’s next best chance fell to Bundu, after good work by Forshaw and substitute Joe Edwards, but this time the striker fired high over.

Cooper did well to save low at his near post as Dewsbury-Hall fired across the face of goal in the 44th minute from close range.

Cooper was again called into action early in the second half as he made another save, while Dewsbury-Hall tried his luck from 25 yards moments later.

Central defender Dan Scarr did well to stoop and head a pacy Fatawu cross from the right away at the near post as Leicester continued to press or an equaliser.

Fatawu’s next cross from the right – after 56 minutes – found striker Patson Daka and his deft near-post touch beat Cooper but spun past the far upright.

Daka’s last action was firing wide when well placed at the far post after 67 minutes. He was replaced by former England international striker Jamie Vardy.

With just over 15 minutes remaining, Wout Faes’ cross from the right was smashed towards goal by Mavididi but again, Cooper was equal to the effort.

Cooper made an even better stop, bravely diving in to deny Vardy as the Leicester striker broke into the box, one-on-one, in the 88th minute but the hosts held on for the much-needed victory.

Leicester suffered a wobble in their bid for an instant return to the Premier League after a stunning Ryan Longman strike condemned them to a 1-0 defeat at struggling Millwall.

Back-to-back wins had reignited the Foxes’ promotion bid and lifted them back to the top of the Championship.

But they slipped up in south London as the Lions, in need of the points for different reasons, battled to a first win in five matches to go four points clear of the relegation zone.

In a huge match at both ends of the table, Leicester’s defeat will have been welcomed by Ipswich and Leeds as the three-horse race for automatic promotion enters the final straight.

Millwall had a chance to open the scoring in the first minute, George Honeyman floating in a free-kick which Longman headed too close to Foxes goalkeeper Mads Hermansen.

Leicester quickly settled, though, and Stephy Mavididi – the late matchwinner against Birmingham on Saturday – should have done better when he was sent through by Yunus Akgun but his touch was too heavy.

Ricardo Pereira’s clever flick then found Kiernan Dewsbury-Hall, who slipped in Jamie Vardy.

But the 37-year-old former England striker was losing his balance as he got his shot away and Matija Sarkic made a comfortable save.

Dewsbury-Hall, playing as a number 10, took aim from 20 yards but his effort was deflected wide.

Millwall, happy to sit back and let Leicester have the ball, almost snatched the lead on the break before half-time.

Ryan Leonard whipped in a cross from the right and captain Jake Hooper got a firm head on the ball, but it was pushed away by Hermansen.

The goal arrived on the hour and, for Millwall fans at least, it was well worth the wait.

Wout Faes lost the ball in midfield and Billy Mitchell sent Longman scampering away down the left.

The on-loan Hull winger cut inside Harry Winks before curling a spectacular 25-yard effort past Hermansen and in off the underside of the crossbar.

Millwall almost doubled their lead when Michael Obafemi bulldozed his way into a shooting position but Hermansen got down well to save.

Leicester pushed for an equaliser and Pereira got in behind only to see his angled drive blocked by the legs of Sarkic.

They came agonisngly close in stoppage time but were denied by a goal-line clearance from Mitchell to keep out substitute Kelechi Iheanacho’s header.

Enzo Maresca said his Leicester side delivered a “complete performance” following a 2-1 victory at Watford that maintained their 11-point lead at the top of the Sky Bet Championship.

Patson Daka’s 10th-minute penalty and a 55th-minute effort from Ricardo Pereira appeared to have put Maresca’s team on course for a comfortable victory.

But a mistake by Foxes midfielder Harry Winks gifted Watford substitute Emmanuel Dennis the chance to reply in the 63rd minute and the visitors were forced to go on the defensive to protect the points.

And Maresca – who insisted he had got everything he wanted on his 44th birthday – said the combination of his side’s forward efforts together with their late resolve summed up their progress this season.

“We got three points and yes we are happy because it has been a complete performance in terms of we play when we have to play,” he said.

“And we suffered together, after the goals we conceded we lost a bit of confidence but overall I’m happy.”

He added: “It has been a complete performance because when we needed to play, we played the way we want to play. It’s part of the season we are trying to change some things.

“I can understand that the only thing that people can see is just get promoted. But for me get promoted is just at this moment.

“This was a club in transition last summer with lots of important players leaving.

“There are many more thing we have done. But I can understand the focus is on promotion, but we are changing many things.”

And the manager was adamant he would not criticise Winks for the misplaced pass that set Dennis up for the Watford reply.

He added: “The mistake is part of the process. I always said that if they try to do what we work on everyday and make a mistake, then it doesn’t matter. But if they don’t try, then they are not going to play.

“At the end Harry was a bit sad and upset, but it’s not any problem. And we are very happy with the second goal. It was very nice and the performance was good as well.”

Watford boss Valerien Ismael was pleased with his side’s efforts against the league leaders, and in particular ending a run of three games without a goal – even if he was unhappy at the decision to award a penalty after Leicester’s Dennis Praet went to ground after a challenge from Giorgi Chakvetadze.

“I’m really proud of the players and pleased with the performance and mentality they showed,” he said.

“In this game, you saw we had bad luck. After one minute, Bayo was injured and we needed to change the plan. After that, a soft penalty. I’ve been many years in English football and that was a soft penalty.

“Even when 1-0 down, we were disciplined and we were aggressive.

“I said at half-time it was still 1-0, and we had to be patient. It would have been wrong to have lost our heads and pushed too much.

“We had two or three situations on the edge of the box when we should have taken one or both to get back into the game.”

Sam Morsy’s twice deflected stoppage-time equaliser earned second-placed Ipswich a 1-1 draw at home to Championship leaders Leicester.

Morsy’s effort from the edge of the penalty area struck Ricardo Pereira and then the head of Jannik Vestergaard to leave Foxes goalkeeper Mads Hermansen helpless.

Leicester had taken the lead in the 24th minute with a strike from just inside the penalty area by Stephy Mavididi.

The result left Town still six points adrift of their opponents and five points ahead of third placed Southampton, who moved up a place to become the Tractor Boys’ nearest challengers for an automatic promotion spot following their 5-0 victory over Swansea.

Ipswich bounced back from Saturday’s chastening 4-0 loss against Leeds and even stretched their advantage over the Whites to eight points after they were beaten 2-1 by Preston and dropped down to fourth earlier on Boxing Day.

A cross from Wes Burns into the penalty area, aimed for raiding full-back Leif Davis, was headed away for an Ipswich corner by Abdul Fatawu as the hosts made a proactive start.

But they were dealt an injury blow in the 20th minute when George Hirst suffered what appeared to be a hamstring injury and he was forced off.

There were handball appeals by Ipswich players in the 21st minute when the ball appeared to go close to the outstretched hand of Conor Coady but three minutes later the Foxes took the lead through Mavididi.

He found acres of space on the left and curled a shot beyond the reach of Ipswich goalkeeper Vaclav Hladky into the corner of the net.

Referee Sam Barrott turned away penalty appeals from City following a challenge by Cameron Burgess on Kiernan Dewsbury-Hall and Patson Daka was denied by Hladky.

Just before the half-time break a sweeping cross into the Leicester penalty area from Davis was cleared by a stretching Wout Faes to prevent substitute Kayden Jackson meeting the ball at the far post.

Vestergaard grazed the roof of the Ipswich net with his header following a free-kick by Dewsbury-Hall and Conor Chaplin just failed to catch Leicester goalkeeper Mads Hermansen off his line with a shot from just inside the Foxes’ half.

Hermansen then had to dive full length to tip a stunning shot from Chaplin round the post and the Ipswich striker fired over the bar from just inside the penalty area.

Dewsbury-Hall then went down in the penalty area following a challenge by Davis but the referee waved play on and Ipswich grabbed a deserved equaliser in the final moments.

Struggling Sheffield Wednesday snatched a stoppage-time equaliser against Championship leaders Leicester in a 1-1 draw at Hillsborough.

Jeff Hendrick netted in the third minute of injury time to earn bottom side Wednesday a deserved point after a spirited performance following Abdul Fatawu’s 23rd-minute opener for the Foxes.

Wednesday skipper Barry Bannan spurned a golden opportunity inside the opening 30 seconds, dragging his shot wide after finding himself through on goal following a mistake from Ricardo Pereira.

Callum Paterson threatened to punish another defensive lapse minutes later, with Bannan again involved before the striker saw his effort blocked.

Another chance came Wednesday’s way when a Will Vaulks free-kick was met by Bambo Diaby, whose header was comfortably saved by Mads Hermansen.

Leicester’s lead came when Stephy Mavididi sent over a cross from the left which went all the way to the unmarked Fatawu at the far post and he chested the ball down before firing past keeper Cameron Dawson.

Bailey Cadamarteri had a chance in the latter stages of the half when the ball fell to him but his well-struck shot was blocked.

Wednesday’s George Byers then had a tame effort easily saved by Hermansen after the break as the hosts continued to threaten.

Kasey McAteer had a chance to extend Leicester’s lead late on but he poked the ball wide after receiving a pass from Jamie Vardy.

Wednesday’s Marvin Johnson then fired in a low shot but it was straight at Hermansen.

But the equaliser came in the third minute of time added on when the ball was lofted into the area and Paterson’s cushioned header fell perfectly into the path of Hendrick who finished with ease.

Jannik Vestergaard threatened to score with a header at the death, forcing Dawson to make an important save to preserve an impressive point for Danny Rohl’s side.