"I got the chance and I took it", he told LCFCTV.
Leicester initially had little difficulty establishing control, as it created several opportunities during the early exchanges - the best of which arrived in the 22nd minute, when Jamie Vardy's effort from a tight angle was blocked by Orjan Nyland in the Villa goal. We should've done better but in the second half we were a bit better.
Smith said: "He has a lot to prove now because it hasn't happened for him at Chelsea".
"Overall I thought we dominated the game".
Back in 2016-17, Drinkwater was playing a vital role in a Champions League quarter-final against Atletico Madrid, as he and Leicester's triumphant squad rode the high of winning the Premier League title.
Tyrone Mings won header after header as Villa tried to weather the storm and when James Maddison did get past the defender with a bold burst, Nyland was on hand to make another good save.
Lineker said he believed that Iheanacho can regain first-team place and shine under manager Brendan Rodgers.
Since arriving from Manchester City in the summer of 2017 in a £25million deal, the striker has failed to justify his price tag and has been the subject of criticism from some quarters.
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It was the 23-year-old's third goal in the Carabao Cup this season and Rodgers is pleased to see Iheanacho reaping the reward for his hard work.
Former Blues boss Mauricio Sarri played him for only 30 minutes in their Community Shield defeat to Manchester City last season, and Frank Lampard has no interest in him either.
'We just haven't got him as much game-time as what he wanted, and what he needs as well.
While he may not have ended the match with a goal or assist, there is no doubt Maddison was the biggest threat for Leicester.
"I came away that day (2015) thinking, "what a player that boy is".
"It was a great finish".
"Over two ties it was always going to be tough and to get to a final you have to suffer, but the boys are confident".