Dutch star Mathieu van der Poel won an action-packed 120th edition of the Paris-Roubaix cycling classic with a solo ride over the last kilometres on Sunday. The race was decided some 18 kilometres from the finish of the gruelling 257km with 29 cobblestone sections over 54.5km when a seven-strong leader group was split. German John Degenkolb, the 2015 winner, crashed and Belgium’s Wout van Aert attacked, only to suffer a rear wheel puncture on the cobblestones just when Van der Poel had caught him. Van der Poel never looked back and won in the Roubaix velodrome, 46 seconds ahead of his Alpecin-…