George Russell will race alongside teenage sensation Kimi Antonelli at Mercedes next season. The Silver Arrows have yet to confirm the move, but that’s a formality at this stage. Antonelli has signed his Mercedes deal, and an announcement should follow shortly. The Italian, who turns 18 on Sunday, will become one of the youngest F1 drivers in history after just a single season in Formula 2. Russell should now be the team leader at Brackley. Mercedes are unlikely to pose a clear hierarchy but Toto Wolff will surely expect him to consistently beat the youngster in their first season together. F1…