(First posted on Eurosport)
Mayweather completed a comfortable one-sided points win over the Filipino fighter as the welterweight bout watched by millions wordwide failed to live up to the hype.
While Mayweather extended his unbeaten record to 48, former British world champion Hatton - who was knocked out by Mayweather in 2007 and Pacquiao two years later - says that the bout did not showcase the fight game properly.
"It was damaging for the sport," Hatton said in an interview with the BBC.
"I can't imagine there is anyone out there saying they loved it. Considering they're two all-time greats, the money they walked away with, what the fans had to pay, it was all a bit of a letdown.
"Then when Manny blamed his defeat on a shoulder injury, it soured it even further.
"Boxing has UFC (The Ultimate Fighting Championship) breathing heavily down its neck and it was the first boxing match that had crossed over into the mainstream for a long time, so we needed it to be exceptional.
"ButRead More »from Ricky Hatton: Mayweather-Pacquiao so bad it'll put people off boxing for life