Czech Republic’s reigning world and European indoor 400m champion Pavel Maslak will return to action after missing most of last summer due to a hamstring injury when he competes over two laps of the track at the Russian Winter meeting, an IAAF Indoor Permit meeting, in Moscow on 1 February.

The following world indoor records have recently been ratified…

Calvin Smith was still waiting for the family welcome into the world record breakers’ club as he left the track in the Ergo Arena, having brought a momentous conclusion to the three days of the IAAF World Indoor Championships in Sopot.

The USA quartet of Kyle Clemons, David Verburg, Kind Butler III and Calvin Smith set a world indoor record of 3:02.13 in the men's 4x400m relay at the IAAF World Indoor Championships Sopot 2014 on Sunday (9).