Haven't watched MOTD, saw it on Sky Sports and then again on SSN, with Danny Higginbotham reviewing and giving his thoughts, which were that it's wasn't a penalty. He said at first he thought the ref had blown to book Sterling for diving, which would also have been a wrong decision. From what I saw, and it seems Higgy saw the same, Wilson stuck his leg out, missed the ball, also missed Sterling, who then attempted to get round Wilson, but the two came together, and the smaller player inevitably went down.
At least we've got a scapegoat though, eh? It's a shame, as we had plenty of chances, hit the post and forced Mingolet into some decent saves late on, on another day it could have ended 5 or 6 all!