Davydenko baffled by Federer silence on grievances MELBOURNE, Australia (AP) - Nikolay Davydenko has become the latest men's player to question Roger Federer's commitment to backing other players in their complaints about issues affecting the men's game. Davydenko, the former world No. 3, spoke a day after Rafael Nadal criticized his Swiss rival for sitting back while others speak out about issues including the schedule and the distribution of prize money. The Russian says 16-time Grand Slam champion Federer doesn't want "any problems" because "he's a nice guy, he's from Switzerland, he's perfect." Nadal says the majority of players are in agreement that there are issues that need resolving. Davydenko says one of those is an increase in prize money at Grand Slam tournaments.