Chelsea secured an FA Cup quarter-final clash at Manchester United after beating Middlesbrough in their fifth-round tie at the Riverside Stadium.
The visitors made eight changes from the side that lost to Manchester City on Sunday. Chelsea took the lead on 51 minutes when Ramires' shot flicked off Fernando Torres and past goalkeeper Jason Steele.
And victory was completed 15 minutes from time when the impressive Victor Moses scored from close range following a neat one-two between Eden Hazard and Oscar.
In his press conference after the match, Benitez confirmed that he would not stay at the club beyond the current campaign.