Wayne Rooney believes Lionel Messi's arrival in the MLS will bolster the league on and off the pitch but he delivered a warning to the Argentina superstar.
Messi's arrival at David Beckham-owned Inter Miami is imminent with the club and league pushing the boat out to secure his signature. Rooney, manager of DC United, questioned how Miami have pulled off the transfer coup in a dig at the Herons but has no doubt about the benefits the 36-year-old's arrival will bring.
Rooney moved from a top European league to the MLS towards the end of his career and says Messi will need to adapt to his latest challenge.
