LONDON, Great Britain - Tatjana Maria pulled off one of the biggest upsets of the day in fading light, dismissing No.5 seed Elina Svitolina, 7-6(3), 4-6, 6-1, to reach the second round of Wimbledon.

Maria displayed some classic grass court form and footwork to dispatch the two-time French Open quarterfinalist in two hours and nine minutes on No.2 Court.

The German veteran is one of six mothers playing the ladies' singles event at Wimbledon - a list that includes potential third round opponent and 23-time Grand Slam champion Serena Williams, who also advanced on Monday.

Perhaps more importantly, she was one of five women who won a grass court title in 2018 heading into Wimbledon, capturing her maiden WTA trophy at the Mallorca Open over defending champion Anastasija Sevastova.

That comfort with the surface was evident early on as she surged to a 5-1 lead in the opening set. Svitolina struggled with her movement and called a medical timeout for a toe injury on her right foot after the seventh game. The Ukrainian showed signs of life as she saved four set points en route to a 6-5 lead, but Maria turned the tide and took the ensuing the tie-break.

Undaunted, Svitolina thrice broke her unseeded opposition in the second set, holding to love to force a decider, but lost momentum early in the third, falling behind 0-5 with Maria serving out the upset shortly thereafter.

Things won't get too much easier for Maria in the next round, facing former World No.10 Kristina Mladenovic for a spot in the Round of 32. Mladenovic rallied from a set down to defeat Anna Karolina Schmiedlova, 5-7, 6-2, 6-2, winning her first Grand Slam main draw match in exactly a year earlier in the day.