This Week's Biggest Movers*

On the rise:

• #63 (+67) Gilles Muller (LUX) - Quarterfinalist at US Open (pictured)
• #81 (+45) Kei Nishikori (JPN) - Lost in Round of 16 at US Open
• #93 (+19) Kristof Vliegen (BEL) - Winner in early September challenger event
• #82 (+16) Evgeny Korolev (RUS) - Won first round US Open match, semifinalist at early September challenger event
• #40 (+15) Sam Querrey (USA) - Lost fourth round match to Nadal at US Open

Moving on down:

• #123 (-59) Juan Ignacio Chela (ARG) - Hasn't entered an event since Roland Garros, quarterfinalist at 2007 US Open
• #61 (-19) Carlos Moya (ESP) - Second round exit at US Open, quarterfinalist in 2007
• #57 (-18) Tommy Haas (GER) - Lost second round at US Open, quarterfinalist in 2007
• #88 (-18) Sebastien Grosjean (FRA) - Lost first round at US Open, advanced to Round of 32 last year
• #90 (-14) Dudi Sela (ISR) - Lost first round at US Open, has lost 10 of last 12 ATP level matches

* Each week, this will feature players in or just recently out of the Top 100 whose rankings have undergone the greatest change since the last set of rankings.

Top 16:

• 1) Rafael Nadal
• 2) Roger Federer
• 3) Novak Djokovic
• 4) Andy Murray +2
• 5) David Ferrer -1
• 6) Nikolay Davydenko -1
• 7) David Nalbandian
• 8) Andy Roddick
• 9) Fernando Gonzalez +2
• 10) Stanislas Wawrinka
• 11) James Blake -2
• 12) Richard Gasquet
• 13) Juan Martin Del Potro +4
• 14) Ivo Karlovic
• 15) Fernando Verdasco -2
• 16) Tommy Robredo -1