Published December 14th, 2015 - 07:17 GMT Switzerland's Roger Federer of Obi UAE Royals returns the ball to Croatia's Ivo Karlovic of Philippine Mavericks during their International Premier Tennis League (IPTL) tennis match on December 14, 2015 in the Emirate Dubai. AFP PHOTO / KARIM SAHIB View as a slider View as a list Tags:DubaiInternational Premier Tennis LeagueRoger FedererKARIM SAHIBIvo Karlovic You may also like Subscribe Sign up to our newsletter for exclusive updates and enhanced content Subscribe Now Subscribe Sign up to get Al Bawaba's exclusive celeb scoops and entertainment news LatestPopular One killed by missile debris in Abu Dhabi About 3,400 Israelis injured in Iranian attacks since start of war Trump criticizes US-protected allies for refusing to join war on Iran US acknowledges death of several US soldiers in Iranian strikes Ali Khamenei rejected naming his son, internal divisions paved the way for his rise Loading content ...