A women’s distance medley relay team featuring three global medallists set a world indoor best of 10:40.31 at the New Balance Indoor Grand Prix, the opening meeting of the 2017 IAAF World Indoor Tour.

In what was her final outing at the event, Sanya Richards-Ross anchored the USA team to victory in the women’s 4x400m at the Penn Relays in Philadelphia on Saturday (30).

Statisticians A Lennart Julin and Mirko Jalava look back on the best relay performances of the year.

The following world records have recently been ratified...

USA shaved 0.06 off the world record* in the men's distance medley with a time of 9:15.50 on the second day of the IAAF/BTC World Relays, Bahamas 2015.

USA smashed the world record* in the women's distance medley with a time of 10:36.50 on the first day of the IAAF/BTC World Relays, Bahamas 2015.

The new event on the IAAF World Relays programme replaces the 4x1500m and sees teams sending runners out on legs of 1200m, 400m, 800m, 1600m.

Being the only nation in the world that holds distance medley relays with any regularity, it would be the biggest shock of the competition if the USA did not triumph in the newest addition to the IAAF World Relays programme.

University of Oregon’s Edward Cheserek played a starring role at the Penn Relays in Philadelphia, the 21-year-old Kenyan running a composed mile leg in the distance medley relay, at the end of which he kicked away from Villanova’s Jordan Williamsz to give Oregon their second consecutive title on Friday (24).

There is just over a week to go before the IAAF/BTC World Relays, Bahamas 2015, which will be held in Nassau on Saturday and Sunday 2-3 May.

After months of anticipation, Bingo the potcake dog was introduced as the official mascot for the IAAF/BTC World Relays, Bahamas 2015, on Tuesday (22).

The US relay pools for the IAAF/BTC World Relays, Bahamas 2015 were announced by USATF on Tuesday (21).