Daniel Sturridge and James Milner were both major doubts for the game at one point, but now have a good chance of being available for Sunday's game, whilst Marko Grujic is also in with a shout of making Klopp's 18-man squad.
Sturridge, Grujic and Milner all improving
Injury free for some time now, given his record, Sturridge suffered a setback last week when a hip problem ruled him out of last weekend's friendly matches against Barcelona and Mainz. Klopp admitted at the time that he had "no idea" whether or not the striker would be fit to face the Gunners, but Sturridge returned to training on Wednesday.
Serbian midfielder Grujic, who has impressed in his first pre-season at the club, hobbled off with a knock against Mainz, but Klopp was less concerned about his problem, assuring fans that he'd be ready for Arsenal, a statement that now seems to have been proved true.
Milner also picked up an injury at the weekend, forced off against Barcelona with a hamstring problem, leaving the path clear for Alberto Moreno to line up at left-back on Sunday. However, Milner has returned earlier than expected, leaving Klopp with a decision to make.
Klopp has decisions to make regarding fully fit players
As for the rest of the team, Simon Mignolet will start in goal due to Loris Karius' broken hand, whilst Ragnar Klavan and Dejan Lovren seems the most likely centre-back partnership.
Ahead of them, Emre Can, Roberto Firmino, Philippe Coutinho and Sadio Mane seem nailed on to start in the front six, leaving Jordan Henderson, Georginio Wijnaldum, Adam Lallana and Divock Origi competing for the remaining two places.