SINGAPORE – The first round of group matches of the 2018 World Cup has ended with 39 goals scored, evidence of what an exciting week of football it has been in Russia. The Straits Times looks at some of the best and worst moments so far. Best goal: Nacho (Spain) Where do we start? Denis Cheryshev’s second goal in the tournament’s curtain raiser against Saudi Arabia was exquisite. In the exhilarating 3-3 draw between Spain and Portugal, each side had a beauty – Spain defender Nacho’s half-volley looked better and better with every slow-mo replay, while Cristiano Ronaldo capped his hat-trick with a perfect freekick into the top-corner. Dries Merten’s opener for Belgium in their 3-0 win over Panama was struck with pure venom, while Aleksandar Kolarov’s freekick winner for Serbia against Costa Rica was a veritable missile. Our pick is Nacho’s mesmerising, swerving strike. Biggest shock: Mexico beating Germany Yes, we knew a “Champions’ Curse” loomed over Germany. Yes, we knew Mexico winger Hirving Lozano was tipped to be one of the breakout stars of the World Cup. Still, few would have predicted El Tri would stun the defending champions 1-0 in their opening Group F match. They were…