Rafael Nadal hasn't dropped a Davis Cup singles match since losing his debut in 2004. (AP)
Some numbers from around the tennis world:
18: Consecutive Davis Cup singles victories for Rafael Nadal. He is 18-1 overall in singles, the only loss coming to the Czech Republic's Jiri Novak in the Spaniard's team-competition debut in 2004.
33: All-time record for consecutive Davis Cup singles victories, held by Bjorn Borg, according to the ATP's Greg Sharko.
0-10: Richard Gasquet's record against Nadal after a 6-3, 6-0, 6-1 loss in the Davis Cup semifinals last weekend.
2-22: Thomas Muster's combined record in Challenger and ATP-level tournaments since his return in 2010 after an 11-year absence. Muster, 43, announced this week that he would retire after next month's Erste Bank Open in his native Austria.
1: Number of victories for Vania King against top-10 players. The 22-year-old American had been 0-16 in those matchups before defeating No. 10 Marion Bartoli in the second round of the Korea Open on Wednesday.
55: Donald Young's ranking, a career high. He was at No. 146 last February.
116: Sam Querrey's ranking. The 23-year-old American, who peaked at No. 17 last January, returned this week after missing three months with an elbow injury that required surgery. He lost to 22-year-old American Michael McClune in the semifinals of a Challenger event in Tulsa, Okla.
4: Spots available for the season-ending ATP World Tour Finals in London in November. Novak Djokovic, Nadal, Roger Federer and Andy Murray have booked places in the eight-player field.
6: Spots available for the season-ending WTA Championships in Turkey in October. Caroline Wozniacki and Maria Sharapova have booked places in the eight-player field.
$10,609,318: Novak Djokovic's earnings this year, an ATP record. Nadal (2010) and Roger Federer (2007) are also members of the $10 million club.