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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 of the Tour de France as he claimed his fourth stage win of this year's edition 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.
World and Olympic time-trial champion Remco Evenepoel, who started the day third in the general classification, won the other time trial on this year's Tour.
But the Belgian was already slower than the top two when he suffered a mechanical issue, with Vingegaard passing him on the steep final climb.
Despite going 2mins 39secs slower than Pogacar, Evenepoel held on to third in the GC standings, although he now trails the defending champion by well over seven minutes.
Primoz Roglic was third on the day while British youngster Oscar Onley gained 29 seconds on Kevin Vauquelin to leapfrog the Frenchman into fifth overall.
Stage 13 results
Tadej Pogacar (Slo/UAE Emirates-XRG) 23mins
Jonas Vingegaard (Den/Visma-Lease a Bike) +36secs
Primoz Roglic (Slo/Red Bull-Bora-Hansgrohe), +1min 20secs
Florian Lipowitz (Ger/Red Bull-Bora-Hansgrohe) +1min 56secs
Luke Plapp (Aus/Jayco AlUla) +1min 58secs
Matteo Jorgenson (US/Visma-Lease a Bike) +2mins 3secs
Oscar Onley (GB/Picnic PostNL) +2mins 6secs
Adam Yates (GB/UAE Emirates-XRG) +2mins 15secs
Lenny Martinez (Fra/Bahrain Victorious) +2mins 21secs
Felix Gall (Aut/Decathlon-AG2R La Mondiale) +2mins 22secs
General classification after stage 13
Tadej Pogacar (Slo/UAE Emirates-XRG) 45hrs 45mins 51secs
Jonas Vingegaard (Den/Visma-Lease a Bike) +4mins 7secs
Remco Evenepoel (Bel/Soudal Quick-Step) +7mins 24secs
Florian Lipowitz (Ger/Red Bull-Bora Hansgrohe) +7mins 30secs
Oscar Onley (GB/Picnic PostNL) +8mins 11secs
Kevin Vauquelin (Fra/Arkea-B&B Hotels) +8mins 15secs
Primoz Roglic (Slo/Red Bull-Bora Hansgrohe) +8mins 50secs
Tobias Johannessen (Nor/Uno-X Mobility) +10mins 36secs
Felix Gall (Aut/Decathlon-AG2R La Mondiale) +11mins 43secs
Matteo Jorgenson (US/Visma-Lease a Bike) +14mins 15secs