Ruud, the top-ranked Norwegian in history after reaching a career-high No 2 by making the 2022 US Open final, was a level above Tallon Griekspoor in a 6-3, 6-4 win at Sydney.

He converted three of seven break points to clinch victory in 72 minutes against a player who has risen to 23 in the world on the back of ATP Tour titles in Pune and Hertogenbosch this year.

It helped level the tie at the mixed teams tournament after experienced Dutchwoman Arantxa Rus downed Malene Helgo 7-6(7/4), 6-1 in the women’s singles.

Ruud, now ranked 11, returned to partner Ulrikke Eikeri in the mixed doubles, but they were unable to overcome Demi Schuurs and Wesley Koolhof who rallied from a break down in each set to win 7-6(7/5), 7-5.

“I think we just returned pretty well, we just found a way to break their game,” said Schuurs.

Despite losing the tie, Ruud said his singles win was “the perfect start to the season”.

“I really like this court, it was a good match for me,” said Ruud, who lost to Novak Djokovic in this year’s French Open final.

“I’m ready for the new season, I’m motivated, I have a lot of energy in my legs.”

Rus, who at 33 became the oldest first-time WTA title winner in 40 years when she won in Hamburg last season, gave the Netherlands the perfect start.

She broke Helgo immediately before the young Norwegian forced a tiebreaker.

The second set proved easier, with Rus rattling through despite Helgo putting up late resistance to save four match points.

Alexander Zverev and three-time Grand Slam winner Angelique Kerber get their tournament underway later in Sydney when Germany take on Italy.

World No 1 Iga Swiatek spearheads the Polish team in Perth when they face Brazil.