At last, Formula One has a heated rivalry again. Better still, it's in the same team and there are 13 races left for it to develop.
The dominance of Mercedes, which has swept all six races and all six pole positions so far, prompted fears that this season was becoming even more predictable than the last, when Sebastian Vettel won the final nine races and Red Bull crushed everyone.
Then, at last weekend's Monaco GP, a feud erupted out of nowhere between Mercedes drivers Lewis Hamilton and Nico Rosberg to add some much-needed spice to a dull campaign.
Hamilton has won four races this season, but Rosberg captured Sunday's race from pole for his second victory and reclaimed the overall championship lead with 122 points to 118 for his teammate.