McMaster, running from lane 7 in Semi-final 3, clocked 48.26 to cross the finish line ahead of Rasmus Magi of Estonia (48:36).

McMaster joins Long Jumper Chantel E. Malone as an Olympic finalist. Malone reached the Women's Long Jump Final last night, July 31, 2021.

World record holder Karsten Warhholm of Norway also won his semifinal, clocking 47.30 to beat American Rai Benjamin (47.37), who has also qualified.

Alison Dos Santos of Brazil won semi-final 2 in a time of 47.31, beating Abderrahman Samba of Qatar (47.47), who will also feature in the final on August 3, 2021.

McMaster, running from lane 7 in Semi-final 3, clocked 48.26 to cross the finish line ahead of Rasmus Magi of Estonia (48:36).

The line-up for the Men's 400m Hurdles Final at the Tokyo Olympics on August 3, 2021.