After the shocking exit of Manchester United from the group stage of the Champions League Arsenal and Chelsea knew they were living in a glass house and must prevent their opponents from throwing stones in their final game of the group phase to ensure their place in the next round of the competition.
It was a perfect Wednesday night for the two EPL representatives, the London clubs both recovered from an awful start to the campaign to reach the knockout stage.
Chelsea clinched their place in the last 16 of the Champions League with the minimum of fuss on Wednesday, seeing off Jose Mourinho's former club Porto 2-0 at Stamford Bridge.
Diego Costa had a hand in Chelsea's hugely fortuitous opener - his saved effort rebounding in off Ivan Marcano and Willian sealed the victory seven minutes into the second half as Mourinho's men made sure of top spot ahead of Kiev.
While in Greece Arsenal got the job done as Olivier Giroud hits his first Arsenal hat trick to ensure the greatest escape of Arsene Wenger's reign at the Club, Arsene Wenger's men completed a remarkable Champions League escape with a 3-0 win over Olympiacos.
"It's nice to go through the group stage because we were not in a good position and finally we've done it and we're very pleased for our fans and the club and we feel relieved tonight"Giroud told BT Sport
The UEFA Champions League round of 16 draw will be held in Nyon on Monday 14 December, with holders Barcelona among seven past winners involved.
- Two seeding pots have been formed: one consisting of group winners and the other of runners-up.
- No team can play a club from their group or any side from their own association.
- Due to a decision by the UEFA Executive Committee, teams from Russia and Ukraine cannot meet
Group winners: Real Madrid (ESP), Wolfsburg (GER), Atlético Madrid (ESP), Manchester City (ENG), Barcelona (ESP, holders), Bayern München (GER), Chelsea (ENG), Zenit (RUS)
Group runners-up: Paris Saint-Germain (FRA), PSV Eindhoven (NED), Benfica (POR), Juventus (ITA), Roma (ITA), Arsenal (ENG), Dynamo Kyiv (UKR), Gent (BEL)
- Seeded group winners will be away in the round of 16 first legs on 16/17 and 23/24 February and at home in the return matches on 8/9 and 15/16 March 2016