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Wayde van Niekerk set personal bests in the 100m, 200m and 300m in the last month.

On Thursday, the South African races his first international 400m since breaking Michael Johnson‘s world record at the Rio Olympics.

Van Niekerk headlines a Diamond League stop in Lausanne, Switzerland, live on Thursday at 1:45 p.m. ET on NBC Sports Gold and 2 p.m. on NBCSN.

Van Niekerk is preparing for the world championships in London in August, when he is expected to race both the 200m and 400m. The only man to sweep both races at a worlds? Johnson in 1995.

Last Wednesday, Van Niekerk ran the fastest 300m of all time — breaking Johnson’s record — with a 30.81 in Ostrava, Czech Republic.

On June 20, Van Niekerk lowered his 100m personal best to 9.94 seconds. He’s the only man to run sub-10 for the 100m, sub-20 for the 200m and sub-44 for the 400m. On June 10, Van Niekerk dropped his 200m personal best to 19.84 seconds, a national record.

The last month has certainly boosted hopes that Van Niekerk may be able to lower his 400m world record this year. That makes Lausanne a must-watch meet.

Source: Nick Zaccardi| NBC