Bayern Munich winger Franck Ribery is a £20 million target for Chelsea owner Roman Abramovich.
The Daily Mail says sporting director Frank Arnesen and scout Rainer Bonhof were in the crowd to watch France international Ribery play an influential role in the German Cup Final on Saturday as Bayern beat Borussia Dortmund 2-1 in extra time.
Ribery, 25, was outstanding, although the crucial goals came from Luca Toni.
Ribery is on Roman Abramovich's summer hitlist as he looks to give around £100m to whoever is in charge come the start of the season.