On a night of thrilling upsets, five nations emerged with victories as the IAAF World Relays Yokohama 2019 concluded before a crowd of more than 20,000 at Yokohama International Stadium, the largest to gather at an IAAF World Relays.

Following three memorable editions in Nassau and an unforgettable event in Yokohama, the World Athletics Relays will head to Europe for the first time when the Polish region of Silesia plays host on 1-2 May 2021.

The World Athletics Relays will head to Europe for the first time in 2021, with the Polish region of Silesia confirmed today as host of the fifth edition of the biennial event.

At the end of two days of enthralling athletics action at the IAAF World Relays Yokohama 2019, the relay fields for the IAAF World Athletics Championships Doha 2019 have started to take shape.

The United States kicked off the IAAF World Relays Yokohama 2019 with a bang on Saturday (11), producing convincing victories in the competition’s two newest events.

Join Noah Lyles, Morgan Mitchell and Andrew Howe for the latest episode of the World Athletics Club.

Welcome to our comprehensive lead-in coverage to the IAAF World Relays Yokohama 2019, which, for the next 36 hours or so will be your one-stop shop for all things Yokohama as we count down to the start of the 4th edition of the IAAF's newest World Athletics Series event.

The IAAF World Relays Yokohama 2019 take place at Yokohama International Stadium this weekend, 11-12 May, and you can follow all the action on the IAAF website, its associated platforms and via more than 80 broadcasters from around the world.

Fans from the following territories and countries can tune in to coverage of the IAAF World Relays Yokohama 2019 on Saturday and Sunday 11 and 12 May.

Previews of each of the nine races to be contested at the IAAF World Relays Yokohama 2019, which take place on 11-12 May, are now available.

Fast pace, high drama and a strong possibility of surprises, the 4x100m is one of the most exciting disciplines in track and field. USA and Germany, the men’s and women’s winners respectively in 2017, will be back at the IAAF World Relays to take on the world champions in the event as teams seek to secure their places at the IAAF World Athletics Championships Doha 2019.

There may not be World Championships places at stake in the 4x200m, but many of the world’s leading sprinters have opted to contest the rarely-run event at the IAAF World Relays Yokohama 2019 as part of their early season preparations.