Welcome to live coverage of two huge games in the Champions League.
Arsene Wenger's Arsenal only need a draw to ensure qualification at home to a Borussia Dortmund team who have been sensational in Europe but poorly lacking on the home front.
Jurgen Klopp's team have won four out of four in Group D but have just two victories out of 12 matches in the Bundesliga and drew 2-2 with Paderborn at the weekend after holding a 2-0 lead at half-time.
Klopp has some injury problems with Marco Reus injuring himself at the weekend to join star defender Mats Hummels on the treatment table.
Wenger has problems of his own with third choice goalkeeper Emiliano Martinez set to start, while Jack Wilshere and Theo Walcott are also out. Laurent Koscielny does return, however.
In Bulgaria, Brendan Rodgers will be under huge pressure to beat minnows Ludogorets. It may not be as simple as it seems on paper with the Reds in an awful run of form and Ludogorets proving they are a tough opponent to crack at Anfield, where it took an injury-time Steven Gerrard penalty to beat them.
With Daniel Sturridge and Mario Balotelli out, Rickie Lambert will lead the line for Liverpool.
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