Jakub Mensik prevents Jannik Sinner from reaching another final as he knocks the world number two out of the Qatar Open quarter-finals, while Carlos Alcaraz reaches semis.
Jannik Sinner and Carlos Alcaraz remain on course to meet in the Qatar Open final after both claim straight-set wins on Wednesday to reach the last eight.
Australian player Destanee Aiava says tennis has a "racist, misogynistic, homophobic and hostile" culture as she announces her retirement from the sport at 25.