Basel fell to third-placed FC Sion 3-0 allowing FC Zurich to climb to the top of the Swiss Super League thanks to a 1-0 win over Bellinzona, taking a two point lead.
Source: Basel slip-up sees Zurich top (http://www.fifa.com/worldfootball/clubfootball/news/newsid=1427711.html?cid=rssfeed&att=)