Confidence clearly is the key. I read recently that Sissoko had to be consoled by his teammates for the abuse he got from our own fans. Prior to the Internet, feed back mainly came from fans at the match but now there is Forums, comments pages on Newspapers etc. Whilst players will not read all of them, friends and family do and will pass these things on. Therefore as I have said before it is Counter productive to overly criticise our own players. I do not think there is 1 player that does not receive some criticism from fans on here. Kane was affected by the criticism re claiming that Goal last year although not really our supporters. Rose by reaction to his Newspaper articles and Lloris recently.
Now I am not advocating that we should not criticise players or the club but at times it really does go too far if someone is regularly saying a player is shit and should be got rid.
I went and saw Sissoko in one of his earlier games in the CL and his control was abysmal but he has certainly improved recently and with the support he received on Saturday hopefully he will continue to improve but it will not help if fans are on his back as soon as he misplaces a pass.