Manama, Bahrain, Jan. 31 -- Callum Tarren leads by two shots at the halfway stage of the Bapco Energies Bahrain Championship after battling back from a slow start to post a superb second-round 67.

The Englishman went into the second round on eight under par after firing a flawless 64 on Thursday but was unable to keep the bogeys off his card in the early stages on Friday afternoon.

After dropping a shot at the opening hole, Tarren made another bogey on the fourth to slip even further off the pace.

But he bounced back in style, carding four birdies in his next five holes to turn in 34 blows.

And the birdies kept coming on the back nine as Tarren picked up shots at the 11th, 13th and 14th to head into Saturday's third round on 13 under ...