Van Marwijk said Robben had had only one full training session in the last three weeks.
Former sumo wrestler Kelly Gneiting poses before a training session for the U.S. sumo Open.
The world's fastest man, Olympic gold medalist and world record holder Usain Bolt, once visited a Manchester United training session.
Mr. Obama has offered to buy personal training sessions for his most recalcitrant staffers.
Toure was so impressed he asked to have a solo training session at 9pm on the night he arrived to sign his contract.