Uefa has chosen Italian referee Pierluigi Collina to officiate during the second leg of Chelsea's Champions League tie with Barcelona on Tuesday.
Chelsea boss Jose Mourinho predicted the appointment after criticising Anders Frisk following the first leg, which Barca won 2-1 at the Nou Camp.
Collina refereed the 2002 World Cup final and 1999 Champions League final.
German Herbert Fandel will take charge of AC Milan against Manchester United in the San Siro on Tuesday.
Mourinho was angry after the first leg and claimed that Barca coach Frank Rijkaard went into Frisk's dressing-room to talk at half-time.
And the Portuguese boss said that he wanted Collina to be handed control of what may prove to be an explosive contest at Stamford Bridge.
"There is something that tells me that in London the referee will be Collina, the best in the world," said Mourinho.
"A perfect referee with personality and quality."
The decision to appoint Collina comes just days after reports he will retire in the summer to take up the job of assigning referees for Italy's top two divisions.
At 45, the man considered to be the world's finest referee has reached retirement age for Italian officials and also for Fifa and Uefa competitions.
However, the Italian referee's union is lobbying to raise the retirement age to 48 - and there have been moves to grant Collina an exemption to continue.