The big guns are beginning their Indian Wells campaigns today with Iga Swiatek, Elena Rybakina, Alexander Zverev and Daniil Medvedev among those in second-round action.

23:20 CET – Top seed Alexander Zverev is out! The German has been knocked out by Dutchman Tallon Griekspoor after a three-hour battle 4-6, 7-6(5), 7-6(4). A huge shock at Indian Wells.

Meanwhile, Katerina Siniakova and Elina Avanesyan are through in the women’s draw.

22:49 CET – Twenty-fifth seed Katie Boulter is the first seeded player of the day to be really challenged as she needed three sets to take down Romania’s Irina-Camelia Begu. The Briton came back from a set down to win 6-7(2), 6-3, 6-0 in two hours and 39 minutes.

21:51 CET – Another Frenchman is through to the next round after Quentin Halys won his match that was carried over from last night, beating Spanish qualifier Pablo Carreno-Busta 6-3, 6-4.

21:45 CET – Over to the men’s draw, where 18th seed Ugo Humbert has beaten Japanese veteran Kei Nishikori 6-4, 6-3.

21:35 CET – Elena Rybakina, the seventh seed in Indian Wells, is through to the third round after she defeated Suzan Lamens in straight sets 6-3, 6-3 in 86 minutes.

Another seed is safely through too, as Karolina Muchova is into the next stage with a 6-4, 6-3 victory over Elisabetta Cocciaretto.

21:19 CET – Our first result of the day is in, as 10th seed Tommy Paul has won an all-American encounter 6-3, 6-1 against Tristan Boyer.

Meanwhile, Ukraine’s Marta Kostyuk has made light work of Robin Montgomery, with the world number 18 beating the American 6-1, 6-3.

19:55 CET – Also in action along with Zverev in around five minutes is women’s seventh seed Elena Rybakina, who is also going up against a Dutch player in the form of Suzan Lamens.

18:00 CET – Hello and welcome to Flashscore’s coverage of today’s tennis!

We have a huge day – or night, depending on where you are in the world – of tennis ahead of us with the beginning of the second round at Indian Wells marking the arrival of the world’s best players.

The first of them to take to the court will be men’s second seed Alexander Zverev, who is facing Talon Griekspoor in two hours.