Mercedes F1 boss previews Barcelona race
TOTO WOLF "THE 70th Anniversary Grand Prix was a good reminder how unpredictable and challenging our sport is and how difficult it is to win a race," said Toto. "You need to get absolutely everything right to beat your opponents - and we didn't do that last weekend. "We were quick in qualifying, but the points are given out on Sunday and that's when we struggled. We got beaten fair and square by Red Bull, and hats off to them again for the job they did. "Our team has always shown its greatest strengths when it was faced with tough…