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She remaining focused as Tsegay bolted clear from the off, winning in a championship record 3:54.86, to go within 0.26 secs of Laura Muir's British record.

Beginning his bid for a first individual podium on the global stage, Azu clocked 6.53 secs to qualify for the semi-finals and improved to 6.52 in booking his place in a wide-open final, where he once again rose to the occasion by equalling his lifetime best.

Olympic finalist Anning set the fastest time of the women's 400m heats, clocking 50.79 secs in setting up her shot at a first individual international medal.

High on confidence after running a personal best 6.49 secs to seal his breakthrough triumph in Dutch city Apeldoorn 13 days ago, he stated then that he was "coming to take it all".

British debutant John Otugade exited at the semi-final stage on Saturday, finishing fifth in his race in 6.67 secs.