Monaco have reportedly joined the race to sign Atletico Madrid left-back Filipe Luis, who has been earmarked by David Moyes as Patrice Evra's replacement.
According to the reports, the Premier League champions already tried to secure the services of the Brazilian international during the January transfer window by launching a £17m bid but the offer was immediately rejected by both Atletico officials and the player.
The 28-year-old defender was reportedly reluctant to move clubs in mid-season, because with the summer World Cup on the horizon he wants to continue playing regularly in La Liga to increase his chances of making the trip to Brazil.
Nevertheless, Spanish newspaper Mundo Deportivo claim both Atletico and Filipe Luis may be more receptive to offers in the summer, and Manchester United are keen to renew their attempts to sign him at the end of the season.
The report adds that Moyes's side will have to battle with a number of clubs who are also interested in the player, including French big spenders Monaco who want to bolster their squad for next season, as they hope to play in the Champions League.
After signing Juan Mata from Chelsea, United are preparing a big clear-out at the end of the season and one of Moyes biggest concerns is to find a replacement for Evra, whose contract expires this summer.
They have been heavily linked with Real Madrid's Fabio Coentrao and with Southampton youngster Luke Shaw but according to Spanish reporters Filipe Luis is Moyes' first-choice.
The Brazilian, who is currently out of action through a minor injury, is considered one of the best left-backs in Europe and has been a pivotal player in Atletico's recent success.
Mundo Deportivo reports that United scouts have been also monitoring Atletico playmaker Koke and centre-back Miranda during their trips to Spain.