May I remind you, the 77% was the only
time this year that Robby served over 65% (of first serves) for a match, and he happened to win that match!
Out of the current Top 50 players, Robby has one of the overall 15 lowest first-serve percentages this year... And who joins him? Hanescu (who hasn't won a match this year), Gasquet, Monfils, Verdasco, & Rusedski (all of whom have lost more matches than they have won this year)... Coria also
Robby has typically won at least 70% of points on his first serve... so I'm pretty confident that if he got more first serves in, he'd be winning more points, and thus not getting broken as easily, or as often. There's always other factors that can contribute to a loss, but this one stands out to me... I guess because the last set he played in Miami, his first-serve % was 39! Opponents are much more confident when they continue to get weaker second serves coming their way, especially on a surface like clay...