Pennetta, at 33 the oldest first-time Grand Slam finalist in the Open era, on Saturday became the first Italian to win the US Open women's crown with an efficient 7-6 (4), 6-2 victory over compatriot and childhood friend Roberta Vinci.
Li Na notched another pay-back victory at the US Open, beating former world number one Jelena Jankovic 6-3 6-0 to advance to the quarterfinals on Sunday.
But the possibility of air strikes against Syria has recalled some painful memories for Serbia's Novak Djokovic and Ana Ivanovic, who broke from their usual routine at the US Open to talk about their personal experiences with war.
Serena Williams easily won her eagerly-awaited clash with Sloane Stephens at the US Open on Sunday as normal service resumed at the last grand slam of year.
Li Na avenged her recent loss to Jelena Jankovic of Serbia by thrashing the former world No 1 in straight sets to reach the quarterfinals of the US Open.
Grand Slam king Roger Federer showed off his fitness by sprinting into the round of 16 at the US Open on Saturday, beating Adrian Mannarino 6-3, 6-0, 6-2 to turn out the lights on Day 6 of the tournament.
Second-seeded Rafa Nadal has not lost serve once in three one-sided victories at the US Open this week but he feels his service game needs improving in his quest for another title at Flushing Meadows.
Whisper it quietly, but a beast might be stirring at Flushing Meadows.
Six doctors told former world No 1 Lleyton Hewitt he should retire. Thankfully he sought further opinions and is now looking forward to a third-round clash at the US Open.
Li Na looked like a Grand Slam champion, while Laura Robson looked like a promising teenager.
Hardy Nadal learning to cope with the ups and downs of tough game
Tearful Sara Errani became the US Open's highest-seeded casualty on Thursday and admitted filling the famous shoes of the absent Maria Sharapova in the New York pecking order was overwhelming.
Victoria Duval is growing in more than just stature.