Mikko Ilonen leads in Ireland at the Irish open at the Fota Island Resort. Mikko Ilonen / Getty Images Mikko carded a course record -7 under par 64 at Fota Island Resort to establish a two shot lead after the first round of the Irish Open. He recorded eight birdies and one bogey, and said patience was the key; “It was a slow start really. The first sort of four or five holes I felt like I can't get anything going, but I stayed patient and then the birdies kept coming. In the end I managed to hit a couple of good putts which was nice.” There are three players tied in third position at -5 under par following their opening rounds of 66. Marcel Siem, Robert Karlsson and Magnus A Carlsson sharing. Robert really enjoyed his day; "It was nice, I'm very, very happy. I worked quite hard when I've been at home since the Nordea Masters, so it's been nice to keep it going. I've done a bit of work with my coach and things are coming together quite nicely. The long game was very, very good today." Graeme McDowell is back in a tie for 9th place in the log jam at -3 under par, while three-time major winner Padraig Harrington returned a -2 under par score of 69, which was matched by the defending champion Paul Casey. Rory McIlroy slumped to an opening round of +3 over par 74, and will have to pay really well tomorrow if he is to make the cut; "I still drove the ball great and got in the positions that you need to, but short-sided myself a couple of times, hit a couple of loose shots with my wedges and could not get a putt to drop." "I was pretty sloppy with the scoring clubs so I might head to the range this afternoon to work on those. I need to do better tomorrow to be here for the weekend."