Froome retains his grip as Martin claims yellow

Etixx-Quick Step rider Tony Martin of Germany celebrates on the podium after winning the 223.5-km (138.9 miles) 4th stage of the 102nd Tour de France cycling race from Seraing in Belgium, to Cambrai, France, July 7, 2015. REUTERS/Eric Gaillard

CAMBRAI, France (Reuters) - Chris Froome lost his yellow jersey but retained his grip on his rivals after surviving a day on the cobbles in the Tour de France on Tuesday.

German Tony Martin won the fourth stage with a late attack and snatched the overall lead at the end of a body-punishing 223.5-km ride from Seraing, Belgium.