Vestergaard red card early on, but 10 men of Saints lead through Ward-Prowse penalty after Iheanacho handball
Evans heads in Iheanacho cross to equalise
Third-place Leicester eight points clear of fifth-place West Ham
Southampton move 13 points clear of bottom three
Southampton 1-1 Leicester
Ayoze Perez' cross is headed away by Kyle Walker-Peters. Leicester then switch it around patiently from left to right until Caglar Soyuncu curls it straight out for a goal kick.
Brendan Rodgers shakes his head furiously on the touchline. Ralph Hasenhuttl likes that.
Southampton 1-1 Leicester
Nice work from Marc Albrighton on the right. He twists inside, puts a cross in towards the back post for Jamie Vardy and Kyle Walker-Peters does really well to put him off. Excellent defending.
Southampton 1-1 Leicester
The ball almost falls for Wilfred Ndidi on the edge of the Southampton box and he was setting himself up for a volley but Youri Tielemans gets in his way a little.
Ndidi hesitates, tries to control it and his second touch is loose. It's cleared but only as far as the halfway line.
Southampton 1-1 Leicester
Jamie Vardy tries to get across Mohammed Salisu as it comes in from the left by Caglar Soyuncu but it's too high for him.
Southampton 1-1 Leicester
Kelechi Iheanacho is the first Leicester player to concede a penalty and assist a goal in a Premier League game since Jeffrey Schlupp in May 2016 vs Chelsea.
Southampton 1-1 Leicester
Southampton change. Ibrahima Diallo is on for Takumi Minamino.
Southampton 1-1 Leicester
Timothy Castagne tries to link-up with Jamie Vardy but the striker's first touch is poor and it rolls out for a throw-in.
He shouts his frustrations but it's probably best not to repeat what he said.
Southampton 1-1 Leicester
Jack Stephens manages to creep through on the right and it's awkward for Leicester to defend at the near post as it's almost flicked across the six-yard area. It's eventually scrambled away.
Southampton 1-1 Leicester
Karen Carney
Former Arsenal winger on BBC Radio 5 Live
It is an unbelievable ball from Kelechi Iheanacho. Jonny Evans heads it in low and there was no chance the goalkeeper could get anything on it.
Southampton 1-1 Leicester
Marc Albrighton is on for Leicester, replacing Luke Thomas.
Jonny Evans
The right place at the right time.
Wilfred Ndidi backheels it to Kelechi Iheanacho just inside the box. He curls it in perfectly for Jonny Evans, who is right on cue to nod it in from a few yards out.
Game on.
Southampton 1-0 Leicester
Ayoze Perez has a shot tipped over this time. They are getting closer, Leicester.
Southampton 1-0 Leicester
James Maddison picked up a knock a few moments ago and he's still hobbling a little.
Leicester have a corner here though - Caglar Soyuncu flicks it on at the near post and Kelechi Iheanacho can't quite get a toe on it.
Maddison then curls another long range effort in and it's tipped over the bar by Alex McCarthy.
Southampton 1-0 Leicester
Jonny Evans plays a lovely searching ball over to Jamie Vardy. He nods it down to Wilfred Ndidi, who lays it off to James Maddison, but his dinked ball into the box is cleared.
Ayoze Perez then whips it in from the right but Luke Thomas can't get a clean connection on it.
Southampton 1-0 Leicester
James Maddison absolutely thumps one way over the bar from 25 yards out.
Surely not time for that yet!
Southampton 1-0 Leicester
Karen Carney
Former Arsenal winger on BBC Radio 5 Live
It is a brilliant penalty from James Ward-Prowse. Kasper Schmeichel went the right way but the shot had too much power on it.
Southampton 1-0 Leicester
James Ward-Prowse points at his head as he rallies his team-mates before the restart.
"Focus," he urges.
James Ward-Prowse
Cool as you like.
The skipper slots it into the bottom left corner and out of reach of Kasper Schmeichel, who went the right way.
Huge goal for 10-man Southampton!
Southampton 0-0 Leicester
It won't be. James Ward-Prowse to take the penalty.
Southampton 0-0 Leicester
Obviously there's a check.
Kelechi Iheanacho's arms were in the air though. Doubt this will be ruled out.