"I'm sorry for the fans, not just the ones here but the ones at home watching".
Mourinho has denied there is a rift with United chief executive Ed Woodward about the lack of transfer activity but there is no straight answer from either party about why the club failed to bring in a new central defender.
He praised United fans for their attitude at the end of the game, saying "all our fans don't read papers, all our fans don't watch television, all our fans are more intelligent than that and answered in an wonderful way".
Unai Emery opens up on Arsenal tactics
Emery told reporters today: "After the first two matches, we have two defeats and we need to win this match against West Ham. He's a lot more intense, a lot of high pressing and keeping the ball so that it benefits us if we have the ball.
After the debacle of last week's 3-2 defeat by Brighton, Mourinho made six changes and dropped both central defenders, Eric Bailly and Victor Lindelof.
Romelu Lukaku then spurned another golden chance at the United opener after 15 minutes when he fired wide of an open net after a poor back pass from Danny Rose allowed the Belgium worldwide to round Hugo Lloris.
After rounding Hugo Lloris, however, the Belgian striker screwed his shot just wide.
Jose Mourinho sounds like he has lost the plot with his post-match comments because we all watched this game, and they were outclassed.
Kane climbed above Jones from a 52nd-minute corner to expertly direct a header over David de Gea and underneath the crossbar - his first goal on five trips to Old Trafford.
US and Mexico near deal that would set path for NAFTA revamp
Canada still needs to join the agreement, and any deal would need to be approved by Congress before it can go into effect. Mexican President Enrique Pena Nieto told Trump his country wants to incorporate Canada into the new trade agreement.
Moura wrapped up the victory, waltzing past Chris Smalling easily before confidently drilling the ball past David De Gea.
Mourinho said his team was superior strategically and tactically.
Asked about United's defending against Spurs, he said: "I am sorry".
"It is a massive victory for us and I am very proud of the performance".
Disgruntled supporters left in droves after witnessing one of Manchester United's worst defeats at Old Trafford in recent memory.
West Ham's Pellegrini compares Wilshere to Pirlo
The fact that we have faced two formidable and potential title winning challengers in our first two games should count for a lot. But losing 2-1? And on Wilshere's return, he says: "I spoke with him for 15 minutes here in Colney before he left.
Luke Shaw was next to set up Lukaku, chasing down a long ball and cutting a pass back to the former Chelsea player only to see him scuff his first-time attempt right at Lloris. We need to kill teams off, especially away from home.