Ole Gunnar Solskjaer refused to comment on Manchester United’s links to Jadon Sancho after his side’s Europa League exit on Sunday.
Sevilla came from behind to win 2-1 and ensure the Red Devils suffered a third semi-final defeat of the season.
United have been heavily linked with a £108million move for Borussia Dortmund star Sancho, however, a deal is yet to be reached.
Asked about the club’s pursuit of the 20-year-old, United boss Solskjaer told BT Sport: “I’m not commenting on other team’s players, that’s just how the world works.”
Sancho ran riot in a pre-season friendly against Austria Vienna with a goal, an assist and a dazzling bit of skill to bamboozle a defender on the weekend.
While Solskjaer remained coy on names, he did insist work is being done to improve the squad.
He added: “We’re working to improve what we have. We’ve had spells with injuries, spells with players playing a lot. We’re always looking to improve the squad.
“It’s not about a marquee signing, it’s about quality. When you’re going to sign players, it has to be the right player, the right personality and the right fit, who will grow and make us better.
“We might look at it today and see where we need to improve.”
Bruno Fernandes had given United an early lead from the penalty spot, before Suso levelled for Sevilla in the 26th minute.
Sevilla goalkeeper Yassine Bounou was in inspired form to deny Anthony Martial twice and Mason Greenwood in a 10-minute second-half blitz from United, which also saw Fernandes and Marcus Rashford go close.
Substitute Luuk de Jong was the match-winner when he side-footed home Jesus Navas’ cross 12 minutes from time.