China's financial might worries Arsenal's Wenger

Arsenal manager Arsene Wenger. Arsenal v Burnley - FA Cup Fourth Round - Emirates Stadium - 30/1/16. Reuters / Eddie Keogh Livepic

(Reuters) - European clubs should be worried by Chinese football's display of economic might in the January transfer window, Arsenal manager Arsene Wenger said on Friday.

The Chinese Super League out-spent Europe's elite with a series of high-profile signings that could still increase before the local transfer window closes on Feb. 26.