Champions League Tonight: Barcelona Host Aston Villa

The Champions League returns on Tuesday evening for matchday four of the league phase, with Barcelona against Aston Villa the standout fixture of the night.
It is the third matchday in four weeks under the rearranged fixture list, and the pressure is building across the table as the race for the knockout rounds takes shape.
Barcelona v Aston Villa
Barcelona are back at home as they take on Aston Villa in the match of the round. Villa arrive in Spain in strong form, unbeaten in their last six league games after Sunday's dramatic 4-4 draw at Manchester United, and they will fancy their chances of causing an upset at Camp Nou.
Barcelona, meanwhile, are among the sides looking to preserve a perfect record in the competition, and a win in front of their own fans would keep them firmly on course for the last 16.
Atletico Madrid v Bayern Munich
The other heavyweight tie of the evening sees Atletico Madrid host Bayern Munich. It is the fifth meeting between the pair in a Champions League group phase, and Bayern will expect to take a big step towards qualification with a win in Spain.
Manchester United v Roma
Manchester United host Roma at Old Trafford, with the home side desperate for a lift after a chaotic start to their domestic season. United fought back twice from two goals down to draw 4-4 with Aston Villa on Sunday but remain in the Premier League relegation zone, without a league win in eight games.
A European night under the lights offers a chance to change the mood, but Roma will be no pushovers in Manchester.
The rest of Tuesday's ties
Elsewhere on Tuesday, Galatasaray host Stuttgart, Shakhtar Donetsk welcome Sporting CP, Bodo/Glimt face Lille, Feyenoord take on Inter, LASK meet Slovan and Villarreal host Paris Saint-Germain.
Wednesday's action includes AEK Athens against Real Madrid, Fenerbahce against Liverpool, Borussia Dortmund against Real Betis, Lens against Como, PSV against Club Brugge, Porto against Napoli, RB Leipzig against Manchester City, Slavia Prague against Arsenal and Viking against Sabah.
For both sides in the big game, the European test comes during the November international break. Villa return to domestic action at home to Sunderland on 21 November, while United's next Premier League game is away at Liverpool on Sunday 22 November.
Liverpool and the Spanish sides are among those looking to stay perfect in the competition, and with only a handful of league-phase games left, every point is starting to matter.