Paul Casey underlined his return to form following last year’s rib injury as the Ryder Cup ace carded a six-under-par 66 to claim a share of the lead at the Commercialbank Qatar Masters.

Johnnie Walker Classic champion Anton Haig held a one-stroke lead over Englishmen Sam Walker and Paul Broadhurst as the big-hitting South African set the early pace in the opening round of the Qatar Masters this morning.