Luke Donald's nine-month reign as world No 1 is under threat. By losing to Ernie Els in the first round of the WGC-Accenture Match Play Championship, a title he won last year, Donald has given Lee Westwood or Rory McIlroy a chance to claim golf's top spot. But victory on Sunday is required for all the numbers to add up. Westwood has cleared the first hurdle beating Nicolas Colsaerts 3&1. Meanwhile, McIlroy was doing his best to overtake South African George Coetze last night.