Benfica manager Rui Vitoria believes the "cold" Victor Lindelof will flourish under Jose Mourinho despite a stuttering start to his Manchester United career.
The Sweden centre-back is being eased into the United side due to the rigours and demands of Premier League football after they paid the Portuguese champions an initial £30.7m for his services during the summer.
Lindelof played under Vitoria at the Estadio da Luz and, ahead of the sides' meeting in Lisbon in the Champions League on Wednesday, the Benfica boss said he is adamant that the 23-year-old will come good at United.
"He is a very high-quality player, he has been playing with Jose Mourinho," Vitoria said.
"Of course when you move from the Portuguese championship to an English championship, so there is a phase, a stage of adaptation.
"But I do foresee that in the future Lindelof will be a player of Jose Mourinho's team. He has a lot of value, he is very cold, very competitive and has a great deal of quality."