Younis Khan claimed his 34th Test century and first in Australia to keep Pakistan's first innings barely alive in the final Test in Sydney today. The 39-year-old Pakistani became the first batsman to score Test hundreds in 11 countries.Younis went to stumps on 136 with the tourists still trailing Australia by 267 runs and 68 from avoiding the follow-on. Pakistan were 271 for eight with Yasir Shah five not out on Day 3.Australia have already won the series after victories in the Brisbane and Melbourne Tests, while Pakistan are battling to avoid their 12th straight Test defeat in Australia.