Rory McIlroy and Luke Donald lead the way after second day in Dubai . The US Open champion is one of three players to have won all four majors this year - he has also claimed two PGA titles on his own course at Whistling Straits and Royal St George's. Sergio Garcia equals course record of 64 following round of eight-under . South African duo Louis Oosthuizen and Branden Grace a shot off the lead .
Rory McIlroy and Luke Donald lead the way after second day in Dubai . Scotland 's 189th ranked Marc Warren also level with leaders on 11-under . Sergio Garcia equals course record of 64 following round of eight-under . South African duo Louis Oosthuizen and Branden Grace a shot off the lead .