Former tennis player Andre Agassi has shared previously unseen photos of his wife, Steffi Graf, in honour of International Women's Day.

Taking to Instagram at the weekend, the 54-year-old sports star uploaded a carousel of personal snapshots, including a smitten picture of the pair hugging at home, photos of Steffi gracing the front cover of Vogue, a charming black-and-white family photo and a glimpse of Steffi enjoying a coastal walk.

© Instagram

A nostalgic photo also showed the sporty pair beaming with pride as they clutched gleaming trophies. Steffi could be seen wearing a pastel blue silk gown with elegant capped sleeves, while Andre looked smart dressed in a tuxedo with an impressive mane of hair falling down to his shoulders.

"Happy International Women’s Day to the strongest woman I know…," Andre sweetly penned in his caption.

© Instagram

Fans flocked to the comments section with heartfelt messages for the loved-up couple. One commented: "She's still so beautiful!!!!" while a second remarked: "Steffi has that regal vibe about her," and a third added: "Love you both! Thank you both for being wonderful examples of parenthood, athletes, and exemplary human beings."

Former tennis star Steffi, 55, won 22 major singles titles over the course of her professional career. Highlights include winning Wimbledon a whopping seven times, the French Open six times and the US Open five times.