Lukaku, 24, has scored four goals in his first three Manchester United starts but is set to face competition from 35-year-old Ibrahimovic when the Swede returns from injury later in the season. United's decision to re-sign Ibrahimovic has bolstered Mourinho's attack but could also provide him with a dilemma as to who starts up front during the run-in, when United will hope to be challenging for the Premier League. Mourinho had already fielded over half-a-dozen questions on Ibrahimovic's return before he was asked about whether Lukaku and Ibrahimovic could form a successful axis. "No," Mourinho replied, refusing to take any more questions on Ibrahimovic. "In this moment they can speak on the phone that is all they can do, not even face-to-face because he [Ibrahimovic]’s not here." Earlier, Mourinho said: "If we progress in the Champions League and if we progress in one of the two cups, I don’t even say both, if we do ...