United, meanwhile, have included Zlatan Ibrahimovic despite the 35-year-old not being expected to return from injury until the new year.
Liverpool's decision to leave out Clyne from their 25-man squad suggests the defender's back injury, which has prevented him from featuring this season, is more serious than first though.
He had arrived on a free transfer from PSG last summer and was phenomenal, helping the club win the Community Shield, League Cup and Europa League.
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The 24-year-old told reporters while on global duty: "I said to Zlatan I hoped he would be back".
Ex Arsenal midfielder Merson hailed Lukaku as the signing of the summer for his goals and his ability to get the best out of Manchester United's talented midfielder.
Lukaku has made a seamless transition into life at Old Trafford having scored three in his first three Premier League games.
Lukaku was quoted as saying by Belgian daily Het Laatste Nieuws: "When Mourinho called me in NY [in the last week of June], we talked for an hour". They finished sixth last season, yes they have brought in some really quality players, but the Premier League this season, there are six teams that could win it. And with him we are looking to do something special. "I have some players without that great experience, I think it will be fabulous for them and the fans to be back in the Champions League and to have the initial three matches to be played at Old Trafford, I think is fantastic".