Re: Who will complete the "Hexagon" first
To be honest the importance of masters series tournaments is overstated. I doubt many multiple masters series champions actually remember how many masters series tournaments they won in total, or their individual records at each of the individual events. I know that Sampras and numerous other players from the 90s have no idea how many masters titles they have to their name.
Really its a septagon, but the olympics is different to a slam or a regular tour event, in that a gold medal is a gold medal regardless of whether it has been achieved in singles or doubles, so Federer is an olympic champion. Similarly the Davis Cup is different in that it is a team event that combines singles and doubles (often the crucial and decisive rubber).