Michael Norman improves the world indoor 400m record, while three teams dip below recently-set men's world 4x400m mark and Tim Duckworth betters his own British heptathlon record
Joshua Cheptegei and Agnes Tirop win at the Cross Internacional de Itálica, while Maria Lasitskene clears 2.01m in Moscow and Josh Kerr clocks a PB in Albuquerque
After her record-breaking run last winter, Sifan Hassan is looking for more of the same when the IAAF World Indoor Championships take place in Birmingham
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