Rafael Nadal didn't show any side effects from a lack of match practice while beating former top-10 player Mikhail Youzhny 6-3, 6-2, 6-2 in the first round of the Australian Open on Monday.
Top-ranked Novak Djokovic was upset by Ivo Karlovic of Croatia 6-7 (2), 7-6 (6), 6-4 while playing through a sandstorm in the Qatar Open quarterfinals on Thursday.
Top-seeded Novak Djokovic celebrated Serbian Orthodox Christmas by beating Sergiy Stakhovsky 6-2, 6-1 in the second round of the Qatar Open on Wednesday.
Ivo Karlovic served his 9,000th career ace Monday in beating Lukas Rosol 7-6 (4), 6-3 in the first round of the Qatar Open.
Kings blank Coyotes 4-0 in 2nd straight shoutout
Kings score 4 goals in 1st period, beat Wild 4-0
Dustin Brown and Kyle Clifford scored third-period goals, and the Los Angeles Kings rallied to beat the Dallas Stars 3-1 on Tuesday night.
Top seed and former champion Tomas Berdych beat Dustin Brown of Germany 7-5, 6-3 to reach the quarterfinals of the Stockholm Open on Thursday.
Defending champion Grigor Dimitrov advanced to the quarterfinals of the Stockholm Open by defeating Russia's Teymuraz Gabashvili 7-5, 7-6 (4) on Wednesday.
Brown nets go-ahead goal, Kings top Sharks 4-1
Former NCAA champion Bradley Klahn beat Wake Forest freshman Noah Rubin 6-2, 0-6, 7-6 (5) in the first round of the Winston-Salem Open on Sunday night.
Fifth-seeded Dominic Thiem defeated Joao Souza of Brazil 7-6 (4), 3-6, 7-5 in a rain-soaked first-round match at the Bet-at-Home Cup on Monday.
Viktor Troicki returned from a one-year ban for a doping rules violation with victory in the Swiss Open first round on Monday.
Lukas Rosol upset 2006 champion Tommy Robredo of Spain 7-5, 7-6 (6) on Thursday to reach the quarterfinals of the Hamburg Open.
Serbian qualifier Filip Krajinovic defeated defending champion Fabio Fognini 6-4, 6-0 Wednesday as a host of seeded players crashed out in the second round of the Hamburg Open.
Pablo Cuevas of Uruguay won for just the fourth time this year when he ousted sixth-seeded Jeremy Chardy of France 6-2, 6-2 in under an hour in the first round of the Swedish Open on Tuesday.