Lewis Hamilton has given his view on who will be his three main rivals for this year's world title.
The reigning champion picked out three drivers as the biggest threats to retaining his crown this season.
"You look at them all slightly differently," the Mercedes driver said of his rivals. "They all have different characteristics."
He once again tipped his former team mate Fernando Alonso to return to the front now that McLaren has split from Honda.
"Fernando [is the] toughest driver there is," the Briton stated. "His racecraft is mighty.
Hamilton's closest challenger last year was Sebastian Vettel, and he tipped the Ferrari drover to be strong again this year.
"From this year, you could say, 'Give [Seb] more space.' - not in a negative way," he mused.
Hamilton also felt that Red Bull's Max Verstappen would start to really come into his own in 2018.
"Max's racecraft is very impressive," he said. "He's doing wonderful things. But he is going to grow so much over the next 10 years.
"He is more inexperienced than the other guys," Hamilton cautioned. "Max takes a lot of risks ... you have to give [him] more space.
"I don't think it will be a problem," he continued. "It'll just be freaking tough [to beat him]. Wouldn't that be a fight? Even I'd pay to see that."
Hamilton said that that the differences between them all could be measured in "millimetres".
"We're the four strongest drivers," he insisted. "I really hope we are all in the fight [for the title]."
Among the drivers not mentioned by Hamilton was his own team mate Valtteri Bottas.
Also seemingly out of the running for the title as far as Hamilton was concerned are Daniel Ricciardo and Kimi Raikkonen.
Red Bull boss Christian Horner has already warned Hamilton not to underestimate the Australian.
"Lewis would be very foolish to underestimate Daniel," Horner said last month.
"He's a phenomenal driver," he added. "He's absolutely ready for a championship challenge if we can provide him with the tools to do the job."
Hamilton and Ricciardo are both out of contract with their respective teams at the end of 2018. While Mercedes are negotiating flat-out to keep their star driver, Red Bull might be ready to see Ricciardo walk away.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
