The two stared down for the first time in LA to kick off their promotional world tour.
The 35-year-old set to be handed deal until the end of the season.
Lukaku joined United from Everton in a deal worth £100m.
Brazilian admits he 'cannot' stop thinking about moving to Camp Nou.
Stoke City chairman Peter Coates says Austrian available "if the terms are right".
Arsenal midfielder will not sign a new contract according to latest reports.
But Borussia Dortmund ready to fight off speculation until the end of the transfer window.
Final race at famous Northamptonshire circuit could come in 2019 if no new agreement can be reached.
Monaco are determined to keep last season's title-winning side together.
Manchester United tried to sign the Portugal international from Benfica last year.
Injury-plagued defender hoping to increase role under Jurgen Klopp, although loan move could prove beneficial.
The Spanish side admit however things could still change after recent developments.
Uncle Toni unhappy after Nadal relegated to Court One, where he lost in five sets to Giles Muller.
Craig Shakespeare could hand frustrated winger more first-team starts in 2017-18.
Martial has struggled for regular game time under Jose Mourinho.
Robbie Fowler expects Liverpool's next signing 'pretty soon' as Oxlade-Chamberlain rumour resurfaces 
Zlatan Ibrahimovic on course for Manchester United return as injury recovery gathers pace 
Rafael Nadal questions Wimbledon officials' decision after Roger Federer gets Centre Court nod 
Deportivo convinced Arsenal still want Lucas Perez despite Alexandre Lacazette arrival 
Conor McGregor vows to KO Floyd Mayweather in four rounds during tense first face-off