Reports claim the reigning Premier League champions are scouting Benfica youngster Florentino Luis, whilst there are also rumours that Inter Milan centre-half Milan Skriniar is a target.
Elsewhere, Raheem Sterling comes in for some praise for his impressive form for both club and country.
Writes Mark Taylor: “Manchester United and Manchester City are set to lock horns for Portuguese football’s latest top young talent.
“Benfica’s Florentino Luis is on the radar of both clubs and a transfer scrap could be in store next summer.
“That’s according to Record, who claim Pep Guardiola has instructed his scouts to keep a close eye on the 20-year-old.
“City were reportedly weighing up a £55m bid for the midfielder in the summer, as PSG were knocked back by the Portuguese side.
“They may go back in for him at the end of this season thought as they look to replace Fernandinho, 34.”
Daily Express: City ready new Milan Skriniar bid for January
Neil Fissler reports: “Manchester City are maintaining their interest in Inter Milan central defender Milan Skriniar after failing with a move for him last month.
“The Premier League champions wanted to strengthen the centre of defence before the transfer window closed but are now paying the penalty for failing to do so.
“Skriniar is seen as one of the best young defenders in Serie A and Inter Milan will fight to keep him at the San Siro and out of Guardiola’s clutches.”
Martin Keown: “Sterling looked the finished article on Saturday. His movement was magnificent, his work-rate was relentless and he terrorised Bulgaria with his pace.
“England had to be patient - they are now ranked fourth in the world so lesser opponents will dig in and defend in numbers.
“That is where movement off the ball becomes so important but that is also an art that Sterling has mastered.”
Manchester Evening News: Raheem Sterling is the player who could win England a major tournament
Writes Tyrone Marshall: “While Kane's goalscoring record is excellent, Sterling is England's best player. He is the player who can make the difference, who can elevate England from a very good side to a great one.
“If he clicks with Kane as he has done recently then Southgate's side might just be on their way to achieving that.”