Erik ten Hag was frustrated with his players after his first Premier League game in charge of Manchester United ended with a 2-1 home defeat to Brighton.
German midfielder Pascal Gross scored twice for the Seagulls in the first half, with the Dutchman admitting his team gave 'two easy balls away' in the build-up for both goals.
The hosts were only able to get one in response through an own goal by Alexis Mac Allister in the 68th minute.
In his post-match press conference, ten Hag was not pleased with the errors that his team made, and hopes it will be a learning experience for United.