Carlos Sainz is still deciding on his next destination as he prepares to leave Ferrari at the end of the season. The story has become a saga, with the Spaniard unwilling to commit to any one suitor. Williams were preparing to announce Sainz at his home race in Barcelona. The F1 paddock was ‘certain’ that confirmation was imminent, but he hesitated at the last moment. This may have been the result of an improved offer from Alpine. The team’s new advisor Flavio Briatore told Sainz that they may be using Mercedes engines come 2026, and that made them a more attractive proposition than fellow cust…