Coco Gauff battles imposter syndrome on way into Miami Open semi-final

• American No 4 seed beats Belinda Bencic 6-3, 1-6, 6-3 in quarter-final

• Gauff next faces 13th seed Karolína Muchová for a place in final

Coco Gauff may be struggling with an unfamiliar arm injury, indifferent form and the pressure of attempting to transform her serve with the entire tennis world watching, but the one quality that will never evade her is her fighting spirit.

Under far from ideal circumstances, Gauff’s mental toughness continues to guide her through the Miami Open draw and to her best ever result at her hometown tournament. She navigated a path into the semi-finals for the first time in her career with an arduous 6-3, 1-6, 6-3 win over Bencic.