No player in the current game has won more times on grass than the six-time champion, who glided through without breaking sweat as he thrashed Fognini 6-1 6-3 6-2 in just 74 minutes -- five minutes quicker than Federer's first-round win over Spaniard Albert Ramos.
Williams has capped her steady return to the top with an emphatic performance on the grass courts, particularly since the quarterfinals where she dispatched reigning champion Petra Kvitova.
Rosberg's new teammate Lewis Hamilton was back in 10th, as the 2008 world champion managed to complete the session despite hitting a barrier -- extricating himself from the grass as he tentatively reversed back onto the track.