Ratcliffe was in attendance for the first time since agreeing a deal to take a 25 percent stake of the English giants for $1.3 billion.
Goals for United forwards in the Premier League have been in short supply at Old Trafford this season but both Rasmus Hojlund and Marcus Rashford struck in the first half, either side of Richarlison's equaliser.
Rodrigo Bentancur's strike in the first minute of the second half levelled the scores once more. A point moves Tottenham level with north London rivals Arsenal but leaves them still outside the top four on goal difference.
But they will be the happier with the draw as they remain eight points ahead ofUnited, who edge up to seventh. Ratcliffe declared before kick-off that taking a share in his boyhood club is the most exciting investment he has been involved in.
But the British billionaire, wo was sat alongside legendary former United manager Alex Ferguson in the directors' box, got an early introduction to the rollercoaster ride of owning a football club.
Erik ten Hag's men desperately needed the three points to reel in Spurs in the race for a place in next season's Champions League. And the Red Devils could not have wished for a better start.
Hojlund took 15 games to score a Premier League goal after his £72 million move from Atalanta. But the Dane now has two in as many appearances in the English top flight as he blasted a loose ball high past Guglielmo Vicario after just three minutes.
Tottenham were without captain Son Heung-min, who is off leading South Korea's bid for glory at the Asian Cup, and Dejan Kulusevski due to illness. Those absences forced Ange Postecoglou's hand in throwing new loan signing Timo Werner straight into his starting line-up.
The German struggled during a
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