Germany&aposs Marcel Siem hit a stunning eight-under 64 to lead the Trophee Hassan II by three shots after round one on Thursday. With a spot in next month&aposs US Masters on the horizon with a win in Agadir, Morocco, the 32-year-old Siem managed blustery conditions to hole two eagles and five birdies. The weather had settled before Siem took to the course, and despite an early bogey, he went on to build an imposing lead at the Golf du Palais Royal. Siem is currently world number 72, needing to graduate into the top 50 by week&aposs end to guarantee a spot in the Augusta field. The two-time European Tour winner said while a spot at the year&aposs first major was a handsome carrot, he was simply focused on the remaining 54 holes. “Sometimes you need a bit of luck in this game and thankfully today was one of those days where it went my way,” Siem said. “I didn&apost know I still had a chance for the Masters but now we know there are four or five of us in the field here who still might be able to get to the Masters if we win here. “It is a nice incentive but I came here first and foremost to play this tournament and play this golf course. The Masters would be pretty special but I just have to concentrate on what I am doing in this tournament.” Outright second is Spain&aposs Alvaro Velasco, who went bogey free on his first 18 holes on his way to a five-under 67. Champion in 2011, David Horsey is tied for third with fellow Englishmen Graeme Storm and Simon Wakefield on four under. Scotland&aposs Craig Lee, England&aposs Gary Lockerbie and Finland&aposs Mikko Ilonen are next in on three under, with Frenchman Gregory Havret and Dutchman Joost Luiten rounding out the top 10 tied for ninth on two under. Only 20 players finished the day under par, with a group of 10 on one under including Daniel Brooks and Santiago Luna, with the pair still to play the 18th hole. Also among those tied for 11th are England&aposs Richard McEvoy, Australian Scott Arnold and France&aposs Julien Quesne. Defending champion Michael Hoey from Northern Ireland is two over the card, in a tie for 49th. Some of the bigger names to incur the wrath of some windy surroundings earlier on Thursday were Edoardo Molinari (nine over) and Gregory Bourdy (11 over). Molinari&aposs brother Francesco fared significantly better, signing for a one-over 73 to be tied for 32nd.