Andy Murray and Novak Djokovic have a growing rivalry at the top of men's tennis.
Brisbane repeat —
World No. 3 Murray warmed up for the 2013 Australian Open by winning January's Brisbane International for the second straight year.
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Abu Dhabi warmup —
Top-ranked Djokovic showed he is in fine form by earlier winning the big-money exhibition tournament in Abu Dhabi and then reaching the final of the Hopman Cup teams event with fellow Serbian Ana Ivanovic.
ATP champion —
Djokovic's victory over Roger Federer in the final of the 2012 ATP World Tour Finals gave him the year-end No. 1 ranking for the second season in a row.
Golden Brit —
Murray beat Roger Federer in the gold medal match at the 2012 London Olympics in August to kickstart a superb run of form.
Murray's moment —
Murray followed up on his Olympic triumph by beating Djokovic to win his first grand slam title at September's U.S. Open.
Shanghai sensation —
Djokovic turned the tables on Murray in a superb Shanghai Masters final in October when he saved five match points before clinching an epic victory.
Forever Federer —
Federer showed his longevity by winning his 17th grand slam at Wimbledon in July 2012, beating Murray in the final
Tennis warrior —
Djokovic bares his chest after completing his epic six-hour, five-set victory over Rafael Nadal to win the 2012 Australian Open title.
Can Nadal come back? —
Former world No. 1 Nadal hasn't played since being knocked out in the second round of Wimbledon in July 2012, with his expected comeback this year from long-term knee problems being delayed by illness.