![Serbia's Novak Djokovic returns to Amer Delic of the United States during their Men's singles match at the Australian Open Tennis Championship in Melbourne, Australia, Friday, Jan. 23, 2009. (AP Photo/Mark Baker Serbia's Novak Djokovic returns to Amer Delic of the United States during their Men's singles match at the Australian Open Tennis Championship in Melbourne, Australia, Friday, Jan. 23, 2009. (AP Photo/Mark Baker](https://c8.alamy.com/comp/2P97WHC/serbias-novak-djokovic-returns-to-amer-delic-of-the-united-states-during-their-mens-singles-match-at-the-australian-open-tennis-championship-in-melbourne-australia-friday-jan-23-2009-ap-photomark-baker-2P97WHC.jpg)
Serbia's Novak Djokovic returns to Amer Delic of the United States during their Men's singles match at the Australian Open Tennis Championship in Melbourne, Australia, Friday, Jan. 23, 2009. (AP Photo/Mark Baker
![USA's Amer Delic serves against Russia's Marat Safin during the Rome Masters tennis tournament at Rome's Foro Italico clay-court, Tuesday, May 8, 2007. (AP Photo/Felice Calabro' Stock Photo - Alamy USA's Amer Delic serves against Russia's Marat Safin during the Rome Masters tennis tournament at Rome's Foro Italico clay-court, Tuesday, May 8, 2007. (AP Photo/Felice Calabro' Stock Photo - Alamy](https://c8.alamy.com/comp/2PBHNEH/usas-amer-delic-serves-against-russias-marat-safin-during-the-rome-masters-tennis-tournament-at-romes-foro-italico-clay-court-tuesday-may-8-2007-ap-photofelice-calabro-2PBHNEH.jpg)
USA's Amer Delic serves against Russia's Marat Safin during the Rome Masters tennis tournament at Rome's Foro Italico clay-court, Tuesday, May 8, 2007. (AP Photo/Felice Calabro' Stock Photo - Alamy
![Serbia's Novak Djokovic, facing, embraces Amer Delic of the United States at the net after beating him in their Men's singles match at the Australian Open Tennis Championship in Melbourne, Australia, Friday, Serbia's Novak Djokovic, facing, embraces Amer Delic of the United States at the net after beating him in their Men's singles match at the Australian Open Tennis Championship in Melbourne, Australia, Friday,](https://c8.alamy.com/comp/2P97WKH/serbias-novak-djokovic-facing-embraces-amer-delic-of-the-united-states-at-the-net-after-beating-him-in-their-mens-singles-match-at-the-australian-open-tennis-championship-in-melbourne-australia-friday-jan-23-2009-ap-photomark-baker-2P97WKH.jpg)