The 34-year-old Swede is his country's all-time leading goalscorer.
The record-breaking Swede joined the Red Devils earlier this summer.
Keylor Navas could also be out of action for the European final on 9 August
The Algerian has been linked with a big-money switch to the Emirates Stadium.
Liverpool and AC Milan face each other in the International Champions Cup on 31 July in Santa Clara, California.
The Italian has been told he can leave the Reds by Jürgen Klopp.
The Gunners have signed Granit Xhaka and Rob Holding this summer.
The 22-year-old forward was said to be Barcelona's top priority to bolster the attack.
Argentine striker has been linked with a move away from the San Siro this summer.
Lukaku left Chelsea in 2014 to secure a permanent move to Everton.
Zlatan Ibrahimovic signed on a free transfer from Paris Saint-Germain.
The France international had been earmarked as the alternative to Chelsea star Diego Costa.
Lois Karius started in each of Liverpool's five pre-season friendlies.
Real Madrid face Chelsea on Saturday. Find out how to follow the match in the UK and abroad.
The Czech Republic international insists that building a chemistry is equally important.
Manchester United face Galatasaray on Saturday. Find out how to follow the match in the UK.
Chris Smalling has also been ruled out for United's opening Premier League game against Bournemouth.
Costa missed Chelsea's 1-0 pre-season win over Liverpool.
Jeff Reine-Adelaide joined Arsenal from French club Lens last summer.
Fosu-Mensah made his first team debut under Louis van Gaal in February.
David Sullivan reveals the Hammers have had an £8m bid rejected for a left-back.
Reports in Italy had suggested that the transfer could be announced as soon as Friday evening.
Former Valencia star is ready to fight with Samuel Umtiti and Lucas Digne for a role in the first XI.
Zlatan Ibrahimovic poised to make first appearance for the club.
Serbia international has been linked with Manchester United as well.
Ligue 1 club rejected an offer of €35m from the Gunners this week.
Jack Wilshere missed almost the entirety of last season with a broken foot.
The La Liga giants receive €600,000, plus up to €1.7m in add-ons.
John Barnes wants Jurgen Klopp's side to challenge for the title.
Jurgen Klopp has made six signings thus far in the window.