At eight o’clock on Friday evening, Michael Sims held an overall lead in a Nationwide Tour event for the first time in his career.An hour later his hopes of winning the $126,000 prize at the Mexican Open had been all but washed out.Along with the 144-strong field he was forced back to the clubhouse by a torrential downpour.And when he returned with just five holes to play in his second round, his game went down faster than the rain, so badly that he never contended again.Having posted a five-under-par 67 in first round on the 7,708 yards, par 72 course at the El Bosque Golf Club, in Leon, Guanajuato, he extended that score to 10-under in the second round to top the leaderboard, carding an eagle his second of the tournament and four birdies.He had started on the back nine, but all of that good work was undone in the space of three holes. A bogey on the sixth, a bogey on the seventh was followed by a disatrous double bogey on the eighth. It took him seven strokes to finish the par-five on his penultimate hole, plunging him down the leaderboard, out of the top ten and into a position he was unable to retrieve.An even-par round of 72 was recorded on Saturday and yesterday, after yet another weather delay, the 32-year-old Bermudian carded a one-under-par 71.It was a familiar story for the local player who had contended in three previous Tour events in the last seven weeks, forcing himself in to the top ten over the first two rounds only to see his tournament unravel over the weekend.His highest previous finish was a tie for 15th at last month’s BMW Pro-Am in Georgia, and on Friday evening it appeared he would almost certainly eclipse that performance and take home a healthy slice of the $700,000 prize-money.Instead he was scheduled to pocket a few thousand, thanks mainly to Friday evening’s dramatic collapse.When bad weather first interrupted play after 11 holes on Thursday, Sims had raced to four-under after a blistering start which saw him eagle the par-five first and birdie the second to stand at three-under after just two holes.When play was again stopped on Friday, he had moved to 10-under, having taken the overall lead before being joined by Australian Adam Bland.From there, it was all downhill. Bland also collapsed and, like Sims, finished at seven-under-par 281.Both were just inside the top 30 with players still on the course at press time last night