Kimi Antonelli is in line to race for Mercedes in 2025 after Williams confirmed the signing of Carlos Sainz. With a move for Max Verstappen looking virtually impossible, Antonelli and Sainz were the last two contenders for the seat. Williams’ announcement on Monday paves the way for Mercedes to unveil Antonelli. That news could arrive quickly, but Toto Wolff may prefer to bide his time. The 17-year-old is part of the Mercedes driver academy, so Wolff doesn’t need to worry about him being snatched away by a rival suitor. And the pressure seems to have energised him in recent races. After his bo…