Mauricio Pochettino's team were not even at their slick best against Manchester United at Old Trafford on Monday but came away with a clinical 3-0 victory that maintained their 100 percent start to the season.
United desperately need to return to winning ways at Burnley on Sunday to ease the pressure heading into the global break.
After a summer of disappointment in the transfer market, the Red Devils have endured their worst ever start to a Premier League season.
"The gaffer said he is not just going to bring in players for the sake of it", Kane said.
"The first goal was a real blow, we didn't understand why, because we had the game in hand".
He is at odds with executive vice chairman Ed Woodward, who fears Martial leaving and developing along similar lines to Kevin De Bruyne and Mohamed Salah, two other players Mourinho discarded.
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Speaking about De Gea's future earlier this month, Mourinho said: 'His valuation is zero, because he is a Manchester United player who, as soon as possible, will sign a new contract. We'll be better next week. "It was fantastic. At the final whistle, the way they clapped the team was really respectful, and that was nice for us as players to receive after a disappointing result".
"I think we played really well in the first half and if we keep playing like that, and we take our chances, then we have got to win games".
This is Mourinho's third season at the club, and this is significant with the Portuguese manager, as in his management career to date, the third season has usually been pretty disastrous.
Despite a wretched start, Shaw says the dressing room is still united - something he hopes to prove at Turf Moor.
"You want to make the miracle of my team played so well and strategically we were so, so, so, so, so, so good and you want to try and transform this press conference into let's blame the guy".
'He likes it here, we love him, we want him to stay, he wants to stay, so when a player is not in the market the value is zero'. "I prefer to start badly and end well than start well and finish badly".