Mensik upsets Sinner to reach Qatar semi-finals

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. 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.