But it is not the first time he has been involved in a rules row. At the Portuguese Open in 2002, his Dutch playing partner, Maarten Lafeber, refused to sign Martin's card because he alleged he improved his lie during the round. But the Tour decided there was not enough evidence to prove the allegations. AUSTRALIAN Stuart Appleby led by one shot from Ernie Els, John Daly and Brett Wetterich after a seven-under-par 63 in the first round of the Byron Nelson championship at Las Colinas in Irving, Texas.