Luke Donald shot a second round -4 under par 68, to remain at the top of the leaderboard at the DP World Tour Championship on the Jumerirah Golf Estates course in Dubai. He was joined at the top by Rory McIlroy who shot a second round -5 under 67, and Marc Warren who matched Rory's score on the day. All three players are at -11 under par for the Tournament. Rory McIlroy/ Getty Images Rory thinks he was suffering from a bit of sunstroke, and said although he took some medicine he was not feeling too good out on the course; "I got off the course yesterday and had a really sore head and a fever, I think it was a bit of sunstroke. I took a few things and felt better, but I'm not feeling great again. The sun's taking it out of me a bit." Luke thought he was not as sharp on the greens today, but is looking forward to a fun weekend; " Obviously I haven't dropped a shot in 36 holes so feel good about that. I wasn't quite as good on the greens today. I had some opportunities, ten to 15 footers on a few holes that I just misread, but that was a solid round of golf. It was reasonably straightforward. I didn't put myself in too much trouble today, but certainly when I gave myself a little bit of trouble out on the course, I was able to recover with the putter. It's a great field in general and it usually produces a really exciting weekend. The last tournament of the year, we are looking forward to going out on a high note, and obviously Rory is playing well and a bunch of other guys are playing well, so should make for a fun weekend.” Marc said he was happy to be the Scot amongst all the high quality people near the top of the leaderboard; “It was nice to be the Scot in that pack with the Englishman and the Northern Irishman. It's great to be in contention with guys like that, and looking down the leaderboard, it's a high-quality leaderboard and doesn't get any better anywhere in the world really. It's great for The European Tour and it's great for The Race to Dubai, and it's great to be a part of that." Two South Africans Louis Oosthuizen and Branden Grace are only a stroke behind, lurking with intent at -10 under par. Round of the day went to Sergio Garcia, who shot one of golf's most remarkable course records in Dubai - two eagles, nine birdies, two bogeys and a triple bogey seven, to match the course record. We have to assume the operation to remove that astigmatism has helped him see things more clearly now; Sergio Garcia/ Getty images Sergio was amazed at his record equaling round; "It was unbelievable, wasn't it? I'm still kind of getting used to it, my sight's not changed immensely, but the main reason was that with contact lenses I was feeling very uncomfortable." It is still a very tightly packed leaderboard, and it is indeed going to be a great weekend, and a fine finish to the regular season, with the World number one and two battling it out between them. I trust they will both stay focused and not lose sight of the others in this field who are perfectly capable of winning this tournament.