The battle between Red Bull team-mates Daniel Ricciardo and Max Verstappen has the potential to be one of this season's most explosive storylines. Arguably not since Ron Dennis paired rookie Lewis Hamilton alongside double world champion Fernando Alonso at McLaren in 2007 has there been such a strong driver line-up at a top team.
That looks like a bold call when you consider this pairing has only five grand prix wins and not a single world title between them so far, but these two drivers have already made their mark on F1 in a manner that goes way beyond bare statistics.
Ricciardo has grown into one of F1's most consistently outstanding operators since arriving on the scene in late 2011. He has been named Autosport's number-one F1 driver for two of the past three seasons, was Alonso's best driver of '16, and not many can say they've seen off four-time world champion Sebastian Vettel across a season in the same team - in their first season in that team.