Mohammad Hafeez roared back to form with a career-best 172 not out as Pakistan made Sri Lanka pay for a failed gamble in the second Test in Colombo on Saturday. Pakistan, trailing 1-0 in the three-match series, took advantage of Sri Lankan captain Mahela Jayawardene’s surprise decision to field first on a good batting track at the Sinhalese Sports Club. Hafeez led the Pakistani charge with his fifth Test century — and the first after 10 innings — as the tourists moved to a commanding 334 for one by stumps on the opening day. The Pakistan vice-captain has put on 256 runs for the unbroken second wicket with Azhar Ali (92 not out) after sharing an opening stand of 78 with Taufeeq Umar (65).