David Luiz made his way back down memory lane on Wednesday as he went for a wander in west London with his Paris Saint-German team-mates ahead of facing former club Chelsea . Laurent Blanc 's squad are preparing to take on the Blues in a crucial Champions League last-16 second leg at Stamford Bridge later in the evening . And Luiz , who left Chelsea in a £50million deal last summer , lead the squad on a walkbaout , with the French side looking for their first victory on English soil in the competition . David Luiz leads his Paris Saint-Germain team-mates on a walk around west London on Wednesday . Zlatan Ibrahimovic and co listen to manager Laurent Blanc during a training session at Stamford Bridge . Luiz is playing against his former club after leaving Chelsea for PSG in a £50million deal last summer . The fixture is finely poised after the 1-1 draw at Parc des Princes two weeks ago , with the hosts somewhat unlucky not to have beaten Jose Mourinho 's men . PSG trained at Stamford Bridge on Tuesday night and will be looking for revenge after letting a 3-1 first-leg advantage slip at the same ground last season . Blanc called for his side to take their chances in the cauldron at the Bridge . The PSG boss said : 'Chelsea have a slight advantage , because they were able to score an away goal . It 's up to us to try to do what Chelsea did in Paris . 'One of Chelsea 's main threats is the fact they 're very good on the counter attack , so I do n't think we should go gung ho . 'We have to attack and we need to score a goal , regardless of whether Chelsea get one or not . PSG need to score at Stamford Bridge if they are to advance to the Champions League quarter-finals . Blanc says his side must take their chances after drawing 1-1 at the Parc des Princes in the first leg . Edinson Cavani looks focused during a training session in London on Tuesday night . The PSG players will wear black armbands at Stamford Bridge as a mark of respect for those killed in a helicopter crash in Argentina . ‘ David Luiz is very excited to go back to Chelsea . He had great memories there , he helped them to win the Champions League - so I would be very surprised if the Chelsea fans gave him anything other than a fantastic reception . Among the 10 victims of the accident on Monday were renowned yachtswoman Florence Arthaud , Olympic swimmer Camille Muffat and Olympic boxer Alexis Vastine and Blanc said 'the whole of French sport was in mourning ' Meanwhile , Brazilian centre back Thiago Silva has backed team-mate Luiz to take no notice of his former team-mates . Silva said : 'He is a winner , yes he has good memories of Chelsea , but his only objective will be to knock them out - and for us to progress. ’ Thiago Silva insists Brazilian compatriot and PSG team-mate Luiz is ready to knock Chelsea out .
Chelsea play PSG in Edinson Cavani second leg on Wednesday . Former Blues defender David Luiz leads squad on walkabout in London . First leg finished 1-1 after Branislav Ivanovic and Champions League last-16 goals . Laurent Blanc says PSG need to take their chances at Stamford Bridge . CLICK HERE for Chelsea vs PSG team news , probable line ups and more .