Debutant Fousseni Diabate doubles up as Leicester smash five past Peterborough

Kelechi Iheanacho continued his impressive FA Cup form as Leicester City booked their place in round five with a 5-1 win at League One Peterborough.

The former Manchester City forward took his tally to nine goals in as many outings in the competition with a first-half brace that pretty much put an end to any hopes Posh had of springing an upset.

Debutant Fousseni Diabate opened the scoring after just nine minutes and Iheanacho quickly doubled the lead as the hosts were punished for avoidable errors deep inside their own half.

Iheanacho then guided home a cool volley to finish off the move of the match just before the half hour as the Premier League side's class told.

Peterborough improved after the break and pulled one back when Andy Hughes swept past Ben Hamer. However, Diabate had the last word when he capped his bow with a late second, before teeing up substitute Wilfred Ndidi to seal an emphatic victory.

No Vardy or Mahrez? No problem. Claude Puel selected a much-changed Foxes side, with Jamie Vardy and Riyad Mahrez starting on the bench. Harry Maguire was the only survivor from the team that started the league win over Watford, but the French coach will be delighted with the impact of his fringe players. They controlled the first-half and, even though Posh made a fight of it in the second period, their front trio of Demarai Gray, Iheanacho and Diabate proved the difference. The latter will be delighted with his debut and looks like he could be a shrewd addition to the squad.

Kelechi Iheanacho (Leicester City): The 21-year-old has not started a Premier League match since October 16, but gave a timely reminder of his qualities with a clinical double. Linked up superbly with Diabate and Demarai Gray and was a real threat throughout. Puel had urged him to take his chance in the build-up to the game and Iheanacho will feel he delivered.

Peterborough: Bond 7, Shephard 6, Taylor 7, Hughes 6, Tafazolli 6, Forrester 6, Grant 6, Lloyd 6, Maddison 7, Marriott 7, Lopes 6. Subs: Morias 7, Kanu n/a, Borg n/a.

Leicester: Hamer 7, Simpson 6, Maguire 7, Benalouane 7, Fuchs 7, Silva 7, Iborra 6, Diabate 8, Gray 8, Barnes 7, Iheanacho 8. Subs: Albrighton 7, Ndidi 7, Chilwell n/a.

9' - GOAL! Peterborough 0-1 Leicester. Diabate stabs a low effort into the far corner after driving into the right of the area.

12' - GOAL! Peterborough 0-2 Leicester. An error from Chris Forrester is seized upon by Iheanacho, who drives towards the area before firing a low shot into the bottom corner from 20 yards.

29' - GOAL! Peterborough 0-3 Leicester. Iheanacho again! The striker coolly volleys Fuch's sublime cross into the net. Leicester are flying.

58' - GOAL! Peterborough 1-3 Leicester. Posh have one back. The right-wing corner is nodded down by Taylor for Hughes to sweep a scrappy goal through a host of bodies and into the net.

88' - GOAL! Peterborough 1-4 Leicester. Diabate snaps up his second of the match as his fires high into the net after Bond had pushed Gray's shot into the forward's path.

90+2' - GOAL! Peterborough 1-5 Leicester. Ndidi seals the victory with a thumping finish after wonderful play from Diabate on the right.