Peak, the Chinese sports brand, has signed a five-year deal with the Sony Ericsson Women’s Tennis Association Tour said to be worth seven figures. The company and the tour will work together on tennis festivals in China, on clothing for players, and on a co-branded apparel line with revenue sharing. It is part of Peak’s goal to get a bigger share of the Chinese sporting goods market, which is said to be worth $6 billion and growing by 14 percent a year. Nike is the market leader. Peak still trails domestic brands Li Ning and Anta, but last year its sales grew by 51 percent to $456 million.