He said: "I think that's a bit harsh. Like Saturday, we had good chances to score.
"Look, in football, it's playing 90 minutes. We want to start as fast as possible, home and away. From everyone, we work hard to get the space in the second half to get our chances. I don't think that we are having slow starts, definitely not.
"Scoring in the second half, you have to put a lot of effort in the first half. I mean you could also say that we are slow starters but as a team, we don't think we are a slow starting team. There are always improvements. We don't always want to go 1-0 behind and chase the game. We want to make it as easy as possible in the game. There is a lot of room for improvement."
Son also said: "Saturday, even when we conceded an early goal, we showed great character. I wish we could win every single game, 38 games, win them all. You can say easily but in football, performance-wise, I think it's impossible.
"So always winning, losing, but losing in that way against Fulham was not us. Just not us. Saturday I think we showed great character, a great football style off the ball, it was very important. I am very pleased and very happy to get it right. We have nine massive games. A quick turnaround for Tuesday. We have to be ready again. Another big game."