Forward Salah, the Reds' top scorer with 23 goals in all competitions this season, has missed the last two matches because of a groin problem.

Sturridge has not been involved in a game since the Champions League victory over Spartak Moscow on Dec. 6 having suffered with illness and injury.

Liverpool announced on their website on Wednesday that the pair had taken part in a session earlier in the day at Melwood.

Sunday's encounter with City at Anfield will be fourth-placed Liverpool's first match since the departure of Brazil playmaker Philippe Coutinho to Barcelona.

Coutinho signed a five-and-a-half-year contract with Barca on Monday as a transfer that could be worth up to £142 million to Liverpool was finalised.

Liverpool forward Roberto Firmino, his compatriot, on Wednesday posted a message on Instagram saying "Liverpool is no longer the same without'' the "magical'' Coutinho.

Accompanied by a picture of the two players in Liverpool shirts with arms around each other, the message said: "Liverpool is no longer the same without the magical man, I wish infinite success for you, that you enjoy life. And realise all your dreams brother!!

"God is always protecting you and the whole family!! It was an honour wizard [to] play this time together with you.''