20:08 CET - Alexander Zverev (25) came back from losing a set to beat Jiri Lehecka (21), winning 4-6, 6-3, 6-4 in Dubai.
19:45 CET - And the first match of the week is done in Austin, with Katie Volynets (21) getting past Alison Riske-Amritraj (32) 6-3 3-6 6-0.
17:50 CET - Alejandro Davidovich Fokina (23) is also through after demolishing Malek Jaziri (39) 6-2 6-0. The latter has now retired from the sport.
17:43 CET - After having to battle back from 5-2 down in the first set, defending champion Andrey Rublev (25) has beaten Filip Krajinovic (31) 7-6 6-2.
16:06 CET - Today, Djokovic set a new men's and women's record for weeks spent at the top of the world rankings, reaching a stunning 378 weeks. Check out three other tennis rankings landmarks RIGHT HERE.
13:34 CET - We have a few early results from Dubai. Wildcard Thanasi Kokkinakis (26) has battled past Quentin Halys (26) in two tight sets 6-4 7-6(9). See highlights and reaction below.
Lorenzo Sonego (27) is also through, after beating Marc-Andrea Huesler (26) 7-5 6-3.
10:28 CET - Following his heroics in Doha last week, Andy Murray (35) has withdrawn from Dubai to look after his hip. Read more HERE.
8:41 CET - Cameron Norrie's (27) spectacular victory in a rollercoaster contest against Carlos Alcaraz (19) was the fifth title of his career. You can read more about it RIGHT HERE, and check out the highlights and reaction below.
8:16 CET - It's another week, so that means another week of action in the world of tennis. Over the next seven days, we will have coverage from WTA events in Austin and Monterrey, while the ATP Tour heads to Acapulco and Dubai - where we will witness world No.1 Novak Djokovic (35) make his comeback following his win in Melbourne.
Speaking before his return, Djokovic said that he is pretty much pain-free following the hamstring tear he sustained at the beginning of the year. Read more about it HERE.
