0 – Lionel Messi has failed to score in a single goal in six previous meetings against Petr Čech.
2 – Barcelona and Real Madrid are the only two remaining unbeaten sides in this season's Champions League.
3 – Barcelona have been victorious in each of their three previous Champions League knockout ties with Arsenal - the 2005-06 final (2-1), 2009-10 quarter-final (6-3 on aggregate) and 2010-11 second round (4-3 on aggregate).
5 – Arsenal have been eliminated at this stage for each of the past five seasons (Barcelona, AC Milan, Bayern Munich, Bayern Munich, AS Monaco).
6 - Lionel Messi has scored six goals in four Champions League matches versus Arsenal. However, all of these came at Camp Nou.
13 – Arsenal and Real Madrid are the only two sides to have reached the second round for each of the past 13 seasons since the Champions League format changed ahead of the 2003-04 season.
13 – Arsenal have scored in each of their last 13 Champions League matches since losing 2-0 at Borussia Dortmund in their opening group stage game last season.
19 – Barcelona have scored in each of their last 19 Champions League games since being eliminated at the 2013-14 quarter-final stage in a 1-0 second leg defeat at the hands of Atlético Madrid.
46 – Barcelona have scored 46 goals in their 15 matches in all competitions in 2016. By comparison, Arsenal have only scored 13 goals in their 10 matches since the turn of the year.
91 – Barcelona's front three consisting of Lionel Messi, Luis Suárez and Neymar have scored 91 goals in all competitions between them this season.