Celtic manager Brendan Rodgers is remaining "calm" about the prospect of losing Matt O'Riley during the summer transfer window.

The Danish internationalist, 23, oozed class once again as Celtic got their Scottish Premiership title defence off to a triumphant start by defeating Kilmarnock 4-0 on home soil. 

O'Riley has been the subject of bids from Atalanta in Serie A and now Chelsea, who Rodgers' side beat during pre-season, are also believed to be considering a swoop before the August 30 deadline.

The Celtic boss believes his star midfielder knows how much he's valued at the club and he's currently thriving in a team that will only improve him as a player, but didn't rule out an eventual parting of ways this month. 

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"We are quite calm on that," Rodgers told BBC Scotland. "Yeah, there's been offers for him but nowhere near the valuation of the player himself.

"He's just continuing to work every day, and like I said, he understands where it's at.

"But if you see his performance level all the way through pre-season and here today, he's very focused on helping the team, very focused on improving as a player, and he knows he's in a great place to do that. 

"Until that changes then we will continue to work with Matt to help improve his game." 

Asked how much of a bonus it would be if Celtic could retain their prized asset ahead of their upcoming Champions League campaign, Rodgers continued: "I would love for one, Matt to be here. But also two, to have more tools to give it a real go at the Champions League. 

"It's one of our big targets this season We want to see if we can get into those play-off phases and for that obviously with so many games, so many challenges in this season for us, we want to improve the squad. 

"So, for Matt and other players, absolutely that's our challenge over these next three and a half weeks to hopefully get tooled up to have the best opportunity we can."

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Celtic are short in numbers up front, with Kyogo Furuhashi currently the only senior option. 

Rodgers has been eager to bring Adam Idah, who fired the Hoops to Scottish Cup success last season, back to the club. The striker was booed as he came off the bench for Norwich City on Saturday and admittedly would love a return to Glasgow. 

However, negotiations continue to drag on. 

"He's a Norwich player so I've got nothing to add to that," Rodgers stated. 

"But I thought Kyogo was outstanding today. He was unfortunate not to get a penalty. I don't know why he hasn't because he was onside and the keeper has brought him down - and you can't say that he wasn't going to get the ball because the recovering defender got the ball.

"But he deserved a goal. Some of his link up play and his movement in behind were sensational, so I'm really pleased for him and the four goals overall."