Caroline Wozniacki has claimed her first tennis title in a year at the Luxembourg Open as the top-seeded Dane defeated German teenager Annika Beck 6-2 6-2.

Wozniacki’s triumph came on a weekend when boyfriend Rory McIlroy finished second in the Kolon Korean Open.

And former world No.1 golfer McIlroy indicated the two are still very much an item, despite recent reports of a break-up, referring to her as “my girl” in a tweet after her Luxembourg success.

McIlroy sent out a tweet praising Wozniacki on the 21st title: “#21 #luxembourg #mygirl @CaroWozniacki”.

Neither confirmed the rumoured split, and Wozniacki still uses a photo of herself and McIlroy as her Twitter profile picture.

She tweeted after her win : “Thank you for all the support this week! Great to win a title this year! #21”.

Ninth-ranked Wozniacki, who beat Wimbledon runner-up Sabine Lisicki in the semi-finals, gave 57th-ranked Beck no opening in their first meeting.

“This result in Luxembourg is going to give me a lot of confidence,” the 23-year-old.

Wozniacki, an alternate for the season-ending WTA Championships which starts in Istanbul this week, had lost form with her best result this season being runner-up in Indian Wells.

Beck said she had learnt a lot in a week in which she reached her first WTA final. Her best previous run was to the semi-finals in Katowice last April.

The 19-year-old said she had “really enjoyed this week full of lessons for the future”.