Liverpool manager Kenny Dalglish has hailed the influence that Martin O'Neill has had on Sunderland ahead of this weekend's clash at the Stadium of Light.
The Irishman, who replaced Steve Bruce in November, has guided the Black Cats away from the drop zone and up to 12th in the Premier League table.
"It was a surprise to see Steve Bruce get the sack but obviously results were not impressive and it puts everyone under pressure," Dalglish told reporters.
"They have had a great turnaround [since O'Neill took charge]. There are not that many players who have come in to change it so obviously they are playing with greater commitment and are playing much better now.
"They've done very well since he went in there and made themselves very difficult to beat."
Sebastian Larsson's goal earned Sunderland a 1-1 draw with the Reds at Anfield on the opening day of the season.
