Defending champions Germany made a disastrous start to their bid to win back-to-back World Cups with a shock defeat by Mexico. Hirving Lozano's first-half goal was the difference between the two sides in an enthralling encounter in Moscow. Aleksandar Kolarov scored a spectacular free-kick to give Serbia a deserved victory in their opening World Cup Group E match against Costa Rica. Brazil were held by Switzerland to a 1-1 draw at the Rostov Arena.