He said: “I can see United going all the way in every competition.
“I’ve seen the football they play, I’ve seen the togetherness of the team.
“Obviously I’ve not been around the players, but speaking to Gary and speaking to him about the players and about the team I think they’ve played some amazing football this season.
“United have strength in depth and players that United fans love to see perform.
“They love to see players wearing the shirt with pride and wanting to win.
“United have got that now. That has been installed in the players in the team.”
On his memories of 1999, Beckham explained: “My best experience is winning the Treble for United, winning that European Cup.
“What we went through that season is actually similar to this season with United.
“We played well in certain games but not in others but still came out with 1-0 results.
“You can see that now in the team and that is what is so important.
“But for me the experience of playing in 99, there’s no bigger and better feeling than that.”