1/8
Novak Djokovic, left, of Serbia celebrates after defeating Pedro Martinez of Spain in their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
2/8
Novak Djokovic of Serbia signs autographs after defeating Pedro Martinez of Spain in their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
3/8
Novak Djokovic of Serbia plays a backhand return to Pedro Martinez of Spain during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
4/8
Novak Djokovic of Serbia plays a backhand return to Pedro Martinez of Spain during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
5/8
Pedro Martinez of Spain plays a forehand return to Novak Djokovic of Serbia during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
6/8
Novak Djokovic of Serbia plays a backhand return to Pedro Martinez of Spain during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
7/8
Novak Djokovic of Serbia plays a forehand return to during his first round match against Pedro Martinez of Spain at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
8/8
Novak Djokovic of Serbia reacts during his first round match against Pedro Martinez of Spain at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Aaron Favila
