Arsenal and Manchester City are also aiming to win the Premier League title.
The Premier League side have reportedly been monitoring the 18-year-old for much of the season.
Jermain Defoe scored for Sunderland against Liverpool in the Premier League on Saturday.
Jamie Redknapp has hailed Leicester City's results since signing Robert Huth from Stoke City.
Newcastle United are in danger of getting relegated from the Premier League.
Former Rangers striker Lafferty watched Celtic on Sunday.
Tottenham moved to second place after defeating Watford this weekend.
Liam Cooper came straight back into Leeds United's line-up to face Nottingham Forest at the weekend.
Sunderland picked up a 2-2 draw with Liverpool at the weekend.
Manchester City defender admits everyone is playing for their future ahead of management change at the club.