Premier League giants Chelsea were unable to sign a Crystal Palace winger for a surprising reason.

The Blues are said to have failed to activate Michael Olise's release clause recently.

Olise was expected to sign for the club where he played at youth level, but chose to renew his contract with Palace.

Per The Athletic, Olise had to inform Palace owner Steve Parish of the Blues' desire to trigger his release clause.

He would then be told of the figure of the clause, which he would indicate to Chelsea.

However, Chelsea went straight to Palace, which was not in Olise's contract terms.