The defender will now stay with the club until at least 2018.
Patrick Roberts is set to spend the next 18 months at Celtic on loan from Manchester City.
Buckley is on loan with the Championship side until the end of the season.
Bournemouth captain Simon Francis says that pre-season doubts regarding their Premier League ability acts as their motivation.
Henrik Mkhitaryan has blamed his poor start to life at Dortmund on the style of play favoured by the Reds boss.
Leeds United take on Watford in the FA Cup this weekend.
Man United were beaten by FC Midtjylland on Thursday night.
Wolverhampton Wanderers are currently in 12th place in the Championship table.
Martin Keown has had his say on Aston Villa defender Joleon Lescott.
The two sides meet at the Emirates Stadium on Saturday afternoon.