The Dutchman left for AC Milan in January as Bayern endure a frustrating campaign, with the Bavarian giants struggling to qualify for the Champions League.
Robben said: “We have captains [Philipp Lahm, Bastian Schweinsteiger ed.], but Mark van Bommel was a true leader and that is someone that we lack right now.
“When it all goes well, we do not really need this kind of player, but it should be noted that we’ve dropped too many points.”
