ZANDVOORT, Netherlands :Mercedes have expressed full support for Kimi Antonelli after the teenaged Italian Formula One rookie sent Ferrari's Charles Leclerc crashing out of Sunday's Dutch Grand Prix. Team boss Toto Wolff said it was always going to be a learning year, a rollercoaster of brilliance and hair-tearing frustration, and the Zandvoort weekend provided a good example. Antonelli, who has just turned 19, collided with Leclerc after both pitted and the Italian tried to overtake. Race