Celtic have signed Belgian defender Jason Denayer on a season-long loan from Manchester City.

The 19-year-old signed for City following two years in the Anderlecht youth team.

His arrival came just over 12 hours after Aston Villa's Bulgarian international winger Aleksandar Tonev also moved to Celtic Park on a season's loan.

Centre-back Denayer was with the City first-team squad on their tours of Scotland and the United States.

But his path from the club's elite development squad was further blocked this week when the English champions signed France central defender Eliaquim Mangala in a £32million transfer from Porto.

The deal for Tonev includes an option to sign the 24-year-old next summer. And the winger is looking to follow in the footsteps of former Villa and Celtic hero Stiliyan Petrov and become a Parkhead great.

"Joining Celtic is unbelievable, and I feel really good about it," he told the club's website.

"I already knew all about Celtic. Everybody in Bulgaria knows Celtic. I spoke to Stiliyan Petrov and he was very happy for me. He wished me good luck and I hope I can do as well for Celtic as Stiliyan did."

Tonev has won 15 caps for Bulgaria and Villa hoped he could be a Premier League threat when Paul Lambert signed him from Lech Poznan in June 2013, but he only made eight starts last season.

Celtic manager Ronny Deila believes Tonev has more to offer than he showed in England.

Deila said: "Aleksandar's a very quick player and he has two good feet which he can shoot with. He has scored a lot of goals during his time at Lech Poznan and I think he can help bring the club forward with his qualities. We can also make him better."