UPDATE 1-Golf-Magical Singh and Cevaer top bunch at London Club

* Singh defies testing wind with four birdies on back nine

* Unheralded Cevaer ties lead after steady 70

* Young trio McIlroy, Wood and Quiros three shots back

(Updates at end of round)

By Tom Pilcher

ASH, England, May 30 (Reuters) - Indian Jeev Milkha Singh produced a back-nine birdie blitz to take a share of the lead with Frenchman Christian Cevaer after the third round of the European Open on Saturday.

Defying blustery conditions, Singh carded a 71 and Cevaer a 70 to move to nine under par heading into Sunday's final round, three strokes clear of Rory McIlroy (68), Chris Wood (68) and Alvaro Quiros (69).

While Cevaer was steady, Singh dropped to five-under after back-to-back bogeys at 10 and 11 before surging back with four birdies and three pars over the last seven testing holes.