Chelsea beat Rennes through a late Olivier Giroud header on Tuesday to secure Chelsea's qualification from Champions League Group E.
Olivier Giroud powered in a stoppage-time header as Chelsea beat Rennes 2-1 to book a place in the last 16 of the Champions League with two games to spare.
Frank Lampard's side won the reverse fixture 3-0 earlier this month but they were made to work a lot harder for Tuesday's victory - their sixth in a row in all competitions.
Serhou Guirassy looked to have rescued a point for Rennes when he cancelled out Callum Hudson-Odoi's first-half opener in the 85th minute at Roazhon Park.