Speculation that Fernando Alonso will call time on his Formula 1 career after 2018 continues to grow, with Carlos Sainz Sr. the latest to suggest it is possible.
The Spaniard has been hinting at a growing lack of motivation in recent weeks, describing the predictable nature of the sport as "sad" in Barcelona before declaring the Monaco GP this past weekend as the "most boring race ever".
Add to that a McLaren car that has fallen short of expectations and the former world rally champion believes the 36-year-old is getting ready to call F1 quits.
"He is in a period when he would like to be in a different situation," Sainz told Spain's EFE news agency.
"When you've won before, and in his case he has won two world championships and fought for others, if you are not fighting for podiums, races, championships, it is logical that you are not happy and it's especially true if you are as experienced as he is and with the character that Fernando has.
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Rumours of a full-time switch to IndyCar are also growing with CEO Zak Brown, newly recruited advisor Gil de Ferran and Alonso's manager Luis Garcia Abad all in Detroit this week to weigh up a possible McLaren entry.
Brown has also stated his hope that Alonso would stay with the British team to participate in other series after the success of his one-off venture last year and Alonso's need to add the Indianapolis 500 to his resume if he wants to win motorsport's Triple Crown.
