Naomi Osaka was encouraged by her 2022 clay-court debut, winning her opening match at the Madrid Open against Anastasia Potapova.
The former world number one has not played on the red dirt since the 2021 French Open, where she withdrew citing mental health issues.
Heading into this week in Madrid, Osaka had an underwhelming 20-15 record on clay, with each of her grand slam successes coming on hard courts.
But the 24-year-old has spoken of adjusting her approach and learning from clay king Rafael Nadal – and the early signs were positive.
She needed just over an hour to defeat Potapova 6-3, 6-1 on Friday and said: "I'm honestly trying to be more positive with myself.
"This year I came a week early to train on red clay, so I'm just trying to give myself more chances to do better.
Osaka added: "To be able to do it in two sets, for me, it's a really good starting block.
Raducanu, Andreescu
"I think today for me it was really fun, just being able to be back on the clay and not taking those moments for granted."
Fellow hard-court major champions Emma Raducanu and Bianca Andreescu also won their openers, although the latter required three sets to eventually coast past Alison Riske 6-4, 3-6, 6-0.
Raducanu will play another 19-year-old in the second round, with the US Open champion paired with Marta Kostyuk after getting over a slightly slow start to thrash Tereza Martincova 7-6 (7-3), 6-0.
Fourth seed Maria Sakkari overcame a scare, meanwhile, ending her losing run at three matches by coming from behind to defeat Madison Keys in three sets.
"Overall, it was a very positive match to get myself back in the winning feeling," the Greek said.
