Hugo Keenan hopes his injury problems are firmly behind him as the Leinster full-back gears up for Saturday's crunch Heineken Champions Cup opener against Racing 92.

Keenan has hit the ground running since returning from the knee and abdominal injuries that saw him miss the opening two months of the season.

The 26-year-old was propelled straight into the starting line-up by Ireland head coach Andy Farrell and barely put a foot wrong in the wins over South Africa and Australia, while he made his first Leinster appearance of the campaign in last weekend's stunning comeback against Ulster as they extended their winning streak to nine matches.

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Will Connors, Ian Madigan and Malakai Fekitoa spoke to RTÉ Sport ahead of the opening round of this season's Heineken Champions Cup

"It's always frustrating being out on the sidelines, watching those first eight games, the novelty wears off pretty quick," Keenan told RTÉ Sport.

"It was a chance to get my body right. I had a few niggles after last season from the [New Zealand] tour, a few things were catching up with me.

"I was training away during that time, waiting for my body to heal. I was really trying to get back, maybe even before the internationals to get a bit of game time, but that wasn’t to be.

"It’s great to be back. I’m enjoying being involved in two great set-ups. I loved being back in the RDS at the weekend. It was a brilliant return, the atmosphere was class and there was a great turnout.

"It’s an exciting time of the season now, interpros, Europe, and then into the Christmas interpros as well."

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Eddie O'Sullivan and Darren Cave analyse how Leinster overcame Cian Healy's dismissal and a 19-point deficit to defeat Ulster and maintain their 100% start

The runaway leaders in the BKT United Rugby Championship, Leinster begin their quest for a record-equalling fifth Champions Cup in Le Havre when they face an in-form Racing side that have won their last five matches in the Top 14.

The Parisians sent an understrength team to Toulon last Sunday yet still stormed to a 31-14 victory to leave them second in the standings.

Racing have lost three Champions Cup finals, including a 15-12 reverse against Leinster in Bilbao in 2018, while Leo Cullen's side suffered late heartbreak in last season's decider against La Rochelle.

"They've five wins in a row now and they’ve got a lot of their big lads back," said Keenan. "They had a good win away to Toulon on the weekend and I’d say they’ll have a few more individuals coming back as well.

"They’re a really good side, we know that expansive rugby they play. They’ve got a few x-factor players. It’s a serious test, especially going over there. Anytime you go over to France it’s a serious challenge."

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Follow Racing 92 v Leinster (Saturday 1pm) and Munster v Toulouse (Sunday 3.15pm) via our live blogs on rte.ie/sport or on the RTÉ News app. Watch Munster v Toulouse live on RTÉ2 and RTÉ Player.

Listen to live commentary from Sale Sharks v Ulster on RTÉ Radio 1 Extra (Sunday 1pm) and Munster v Toulouse on RTÉ Radio 1.