Mercedes have made no secret of their desire to sign Max Verstappen to replace Lewis Hamilton. But they also know that it’s unlikely, at least for next year. Toto Wolff has known since the winter that Hamilton was headed to Ferrari. But there’s a reason he still hasn’t named his replacement. He’s waiting for a definitive ‘no’ from Verstappen, and also wants more time to assess academy driver Kimi Antonelli. The 17-year-old is conducting a private testing programme for the team in conjunction with his Formula 2 duties. Verstappen was apparently unhappy with Red Bull team principal Christian Hor…