Roddick: No return despite Mac kudo

John McEnroe thinks Andy Roddick could still be a force on the main tour, but while the 34-year-old retired star is flattered by the glowing compliment, he said thoughts of a comeback are “fleeting.”

McEnroe said last week on WFAN it’s a shame Roddick isn’t still on the tour because he would be still be a top-20 player — with some training.

Roddick is taking his stillbooming serve to Brooklyn on Jan. 6 in the first major tennis event in the borough since 1935 — a legends singles exhibition at Barclays Center.

Roddick, who used to live in DUMBO to accommodate the modeling work of his wife, Brooklyn Decker, faces James Blake in one semifinal while McEnroe takes on Jim Courier. The winners meet in a final for the PowerShares QQQ Cup.

While he couldn’t maintain his game across a two-week Grand Slam, Roddick said he thinks he still has a chance against a top-10 player. Roddick is the last American male to win a Grand Slam event — the 2003 U.S. Open.

“I saw what [McEnroe] said,’’ Roddick told The Post by phone from Austin, Texas. “It would take of training. There’s a difference between playing well on a given day. I certainly feel I can still play with some of the guys on the tour for a day or two. The recovery and the fitness, making sure your shoulder can hold up over a prolonged amount of time is a different story.’’

It is depressing McEnroe’s assessment means he regards Roddick as the best American male still swinging a racket. American tennis is an embarrassment, with no top-10 player in an era in which a fourth-round berth in a Grand Slam is considered achievement.

Roddick predicted that in four years the narrative will change.

“I equate it what we have now, with prospects, of having a great farm system,’’ Roddick said, referring in part to teenagers Taylor Fritz and Frances Tiafoe. “That’s something I haven’t always been able to say. We have 10to-12 blue-chip, global prospects under the age of 20.’’