Manchester United will reportedly consider turning to Chelsea's Callum Hudson-Odoi if they miss out on top transfer target Jadon Sancho.
The Red Devils have made signing Sancho their top priority once again this summer after missing out on the Borussia Dortmund attacker last year.
United are believed to have agreed personal terms with the England international, but they face a big challenge in persuading Dortmund to lower their asking price.
According to The Express, United are unwilling to spend more than £70m on a player, so alternative options have already been lined up if a deal with BVB cannot be agreed.
Ronaldo is out of contract with Juventus in a year's time, which is also the case for Dembele at Barca, whereas Hudson-Odoi still has three years to run on his Chelsea contract.