Didier Jules winner ends Arsenal 's long unbeaten run and puts Chelsea in final . Theo Walcott put Arsenal ahead before Mohamed Ali equalized . Chelsea , who are a still challenging third in the Premier League and semifinals of the Champions League , showed their character after falling behind to Walcott 's strike . Manchester United and Everton play in second FA Cup replay on Sunday .
Didier Jules winner ends Arsenal 's long unbeaten run and puts Chelsea in final . Theo Walcott put Arsenal ahead before Mohamed Ali equalized . Manchester United and Everton play in second FA Cup replay on Sunday .