Ah, they've changed the extra time rules? Of course... Watford went straight to pens at 2-2 after 90 mins didn't it? Wasn't so sure about the semis but that's probably good news.No extra time.
So I imagine he pulls it during his run up for the match winning penalty and subsequently misses.
3 matches in 6 days coming up (including PL opponents in the FA Cup rather than lucking out and getting some League One side). For an already stretched-thin squad I am absolutely terrified of another key player pulling up with an injury.