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Tadej Pogacar has become the youngest rider to reach 21 Tour stage wins
Ben Collins
BBC Sport journalist
Tadej Pogacar once again asserted his dominance in the Tour de France as he claimed his fourth stage win of this year's Tour on Friday.
The reigning champion, who regained the overall lead by winning stage 12 on Thursday, produced another commanding ride to win the mountain time trail on stage 13.
The Slovenian, 26, completed the 10.9km route from Loudenvielle to the Peyragudes airfield in the Pyrenees in exactly 23 minutes.
That was 36 seconds faster than his main rival Jonas Vingegaard and he has increased his overall lead to four minutes seven seconds.
More to follow.