Semi-final rules:
" If the aggregate score is level after ninety minutes in the second leg of a semi-final two fifteen minute periods of extra time are played each way. If the aggregate score in a semi-final is still level at the end of extra time the tie is decided by the away goals rule i.e. the team that scored most goals away from home over the two legs advances. If a semi-final tie is still level, the result is determined by a penalty shoot-out."
So if it's 1-1 after 90 minutes, there will be extra time. But if it's still 1-1 after 30 minutes of extra time, then there won't be penalties and we will go to final.