Celtic boss Brendan Rodgers is confident Stuart Armstrong will make a positive impact at Southampton.

Rodgers is sad to see him go but admitted the £7m fee Celtic received was too good to turn down.

"I am really happy for him. It was always his dream to play in the English Premier League," Rodgers said.

"He has gone to a fantastic club that is very, very well run and very well organised. They have got a great coaching environment down there with Mark Hughes, Eddie [Niedzwiecki] and Mark [Bowen] and all the staff that they have.

"They have got a wonderful training facility. The ground is a very good ground so I think it is a great fit for him and I think he will do very, very well.

"Of course you will be sad to lose good players but from the club's perspective they have done good business and Stuart achieves his dream so I am really happy for him."

When asked how he thinks Armstrong will adapt to the Premier League, Rodgers replied: "It is never easy. He has gone to the most competitive league in the world but he has certainly got all the tools to go down and do well.

"He is physically very good. You need to have good physicality to play in the Premier League down south and he has got that. He has got good power and good speed.

"But what sets him apart from a lot of midfield players is he has an instinct to arrive in the box and score."