United start the Premier League season at home to Leicester City on Friday and Mourinho took the opportunity at his pre-match news conference to take a swipe at what he views as fatalistic commentary on his reign from the media, in contrast with praise awarded to unnamed counterparts who fail to lift major honours.
United manager Jose Mourinho, entering his third season at Old Trafford, has looked like a Bassett Hound for most of the summer, predicting a "difficult season" for a team which finished second in May.
Most of the Premier League clubs, especially two of the newly promoted teams, were very busy in the summer.
Having previously managed Barcelona and Bayern Munich, Guardiola is used to high expectations.
They are now a little over 24 hours away from opening the new Premier League campaign, with Rooney looking for the Red Devils to put any problems behind them and lay down an early marker in the battle for top-flight supremacy in England. "They trained Monday, Tuesday, Wednesday and today, so you can imagine they are not really fit and ready".
The extension sees the Premier League rights remain on BeIN's roster of European soccer broadcast rights - which includes the top tiers in Spain, Italy, Germany and France as well as the Uefa Champions League and Uefa Europa League - in the run-up to the 2022 World Cup in Qatar.
"My view is that it is hard for me to believe that we finished second", he said.
"It is hard to believe that we finished second because you are capable of making people that finish second look like they were relegated, and people who win nothing, finish below us, and you make them look like serial winners".
The Red Devils coach has cut a sullen figure throughout pre-season with the former Chelsea boss unable to hide his dissatisfaction with Brazil global midfielder Fred being his sides only high profile signing.