Tottenham boss Mauricio Pochettino hailed Harry Kane's "unbelievable" achievement after the striker netted his 100th Spurs goal in the 3-0 win at Everton. Kane brought up his century when he opened the scoring with what appeared intended as a cross in the 28th minute.It was also his first Tottenham goal of the season - he has famously never scored in the Premier League in August - and after Christian Eriksen had made it 2-0 three minutes prior to the interval, the England frontman slotted his second right at the start of the second half.Pochettino said of Kane's landmark strike: "It is not important, (whether he meant to) cross or shoot - it was a goal for us."I'm happy that he has scored 100 goals for Tottenham."He deserves a lot of praise - congratulations to him. It is an unbelievable mark for him."Kane was the most prominent performer in what was a fine display from the entire Tottenham team, and Pochettino said: "I think it was a very solid performance."I think we played well, and fully deserved in the end the result and to take the three points."I'm very pleased. We have ahead a very busy period and this was a very important victory for us today."There was also praise for Kane from Pochettino's opposite number Ronald Koeman, who said when asked where he ranked the 24-year-old internationally: "Maybe after Lionel Messi and Cristiano Ronaldo and Alexis Sanchez, and maybe one or two more, he is one of the best."Of course the first goal is a lucky one. I don't think he was supposed to shoot the ball in the goal - I think it was a cross."But in his football he is really clever. He is using his body at the right time, his movements, his finishing. He is a top striker."Koeman also described Tottenham as "maybe with Man City, the best football side in the Premier League".Regarding the disappointing performance his own side produced, the Dutchman suggested the Toffees had initially been a match for their opponents before rapidly suffering in terms of confidence when the goals went in."I think until we went 1-0 down, we did well," he said."Then going 1-0 down broke our confidence a little bit. We had problems with the diamond in the Tottenham midfield."They scored the second goal before half-time and at half-time we tried to pick up the team. We changed, making two substitutions, and changed a little bit the positions in midfield, to have a better control."But if you go out of the dressing room and start how we did in second half. That was poor."There was a misunderstanding between Michael Keane and Jordan Pickford, and after that, the next situation was that we were 3-0 down."Then I understand how difficult football can be - one team is full of confidence at that time, we were without any confidence. Then you see the difference."Asked about Everton's aspirations of joining Tottenham as a top-six club and what the game showed in terms of how far away they are, Koeman - who made a raft of signings over the summer - said: "If you look at the second half, we are really far away."If you look at the first 30 minutes, it is different."But the difference between Everton and Tottenham is that they have worked a long time together now with the same players and it is not realistic to expect that Everton already is at that level."If you think we need to be at that level, then it will be really difficult."