Tuesday proved to be a day of shocks at the Dubai Duty Free Tennis Championships. First, two-time champion <a href="https://www.thenational.ae/sport/tennis/elina-svitolina-puzzled-by-humbling-first-round-exit-at-dubai-duty-free-tennis-championships-1.980894">Elina Svitolina was humbled</a> in the first round by American qualifier Jennifer Brady before <a href="https://www.thenational.ae/sport/tennis/elina-svitolina-and-belinda-bencic-both-shock-first-round-losers-at-the-dubai-duty-free-tennis-championships-1.981015">Belinda Bencic</a>, winner here 12 months ago, crashed out to Russia's Anasatsia Pavlyuchenkova. They were not the only seeds to tumble, however, as Sofia Kenin, winner of the Australian Open just a few weeks ago, <a href="https://www.thenational.ae/sport/tennis/elena-rybakina-beats-sofia-kenin-on-bad-day-for-big-guns-in-dubai-1.981062">fell to the in-form Elena Rybakina</a>. Today's action sees Australian Open quarter-finalist Ons Jabeur take on world No 2 Simona Halep on Centre Court. In reaching the last eight at Melbourne Park, <a href="https://www.thenational.ae/sport/tennis/ons-jabeur-keeps-arab-flag-flying-high-with-win-over-alison-riske-at-dubai-duty-free-tennis-championships-1.980567">Jabeur became the first Arab woman to reach the last eight of a Grand Slam</a>. Can the Tunisian world No 45 pull off an upset over the Romanian? We'll bring you updates of each match throughout the day.