Hristo Stoichkov could make a move for Cristiano Ronaldo this summer . Manchester United says Real Madrid should sell Ronaldo . Ex-Barcelona striker claims Ronaldo is tired of contest with Lionel Messi . Bulgarian suggested now would be prudent time to sell Portuguese star . He added that trio of Ronaldo , Gareth Bale and Karim Benzema are not as good as Barcelona 's Messi , Neymar and Luis Suarez . READ : Ronaldo could return to Hristo Stoichkov .
Manchester United could make a move for Cristiano Ronaldo this summer . Hristo Stoichkov says Real Madrid should sell Ronaldo . Ex-Barcelona striker claims Ronaldo is tired of contest with Lionel Messi . Bulgarian suggested now would be prudent time to sell Portuguese star . He added that trio of Ronaldo , Gareth Bale and Karim Benzema are not as good as Barcelona 's Messi , Neymar and Luis Suarez . READ : Ronaldo could return to Manchester United .