“He felt his hamstring so we don’t know,” he added.
“We have to rotate players, we have players who didn’t recover from the game on Thursday. That is the risk. You cannot change those players every game.
“We had 16 shots, probably not enough on target, goals disallowed, a post, that is the difference, you have to win this game.”
Nketiah’s goal was his first in the Premier League since last September and the England under-21 international was full of praise for Scott Parker’s visitors.