Ruben Amorim will retain Altay Bayindir as Manchester United’s No 1 in Sunday’s derby at Manchester City but says he regards his new goalkeeper, Senne Lammens, as one for the present as well as the future.

Bayindir has started United’s three Premier League games, having dislodged André Onana as Amorim’s first choice. Lammens joined from Royal Antwerp for £18m on transfer deadline day but Amorim stated that the 23-year-old needed time to settle.

“Altay is going to continue,” he said. “It is a different league, different country, different ball [for Lammens]. So they [he and Bayindir] will fight for the position. We are really pleased – he is a goalkeeper with a lot of potential. We are in the moment that the goalkeeper needs to be really strong and have a lot of experience but we also have to look at the present with a focus on the future so it is a bit of both. He will be ready.”

United also considered signing Aston Villa’s Emiliano Martínez, who is vastly experienced, so Amorim was asked why Lammens was chosen. “Sometimes as a club you try to see different options – one or another,” he said. “We have an option that can give us different things at the moment but also has a great potential to be our goalkeeper for a number of years.”

Onana has joined Trabzonspor on a season’s loan. Amorim said the 29-year-old struggled with the pressure of playing for United.

“André Onana did a very good season at Inter [before joining United in summer 2023], the quality is there, but in the club sometimes things are getting harder, the pressure is so hard, sometimes you need a change,” he said. “Our thinking is to have a change in the goalkeepers but I wish the best for André Onana – sometimes you can have all the quality in the world but you need a change.”

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Mason Mount and Matheus Cunha will miss the derby owing to injury. “They are out for this game,” he said. “I don’t know how long it is going to take [for their return] – I don’t want to say. If you talk with Cunha he will say he can play this game so I don’t know. We will manage [this] day-by-day. We need those guys to be a very competitive team but we have very good players who are eager to play.”