Mo Farah blitzed to a new world record in the rarely-run one-hour event on his return to the track on Friday at an empty Brussels stadium that also saw Sifan Hassan set a new best in the women's equivalent race.
Three years after having opted for road running, Farah showed no sign of cobwebs as he ran 21.330 kilometres over the 60 minutes behind closed doors at the Brussels Diamond League meet at the King Baudouin Stadium.