
London, October 31: Tuesday's Champions League action sees a number of European giants looking to book their spots in the last 16.
Manchester United host Benfica at Old Trafford, while Paris Saint-Germain's formidable attack - including the in-from Edinson Cavani - takes on Anderlecht.
Chelsea face a difficult clash against Roma in Italy, with Barcelona and Juventus facing away ties against Olympiacos and Sporting CP respectively.
Here, we look at the Opta numbers behind Tuesday's matches.
Basel v CSKA Moscow
31 - CSKA Moscow are currently enduring a 31-game streak without keeping a Champions League clean sheet, last managing it in the 2011-12 campaign.
3 - Basel’s three Champions League games against Russian sides have all ended in victories; 2-0 at home and away against Spartak Moscow in the 2002-03 first group stages as well their 2-0 away win against CSKA last time out.
Olympiacos v Barcelona
9 - Silvio Proto made nine saves in the last outing against Barcelona; no goalkeeper has managed more in a Champions League game this season.
6 - Ernesto Valverde took charge of six Champions League matches with Olympiacos in the 2011-12 group stages, winning three and losing three.
Source: OPTA