Max Verstappen heads to this weekend's Monaco Grand Prix as the Formula 1 driver with perhaps the best (although slim) chance of ending Mercedes' clean sweep of 2019 so far. It's almost hard to believe that 12 months ago many were questioning whether he really had what it took to be up there with F1's greatest.
Sure, everyone had been made aware of Verstappen's combination of dazzling speed, aggressive overtaking and defensive style, all of which made him such a great racer. But his unnecessary final practice crash in Monaco last year - which put him out of qualifying and handed team-mate Daniel Ricciardo an open goal to give Red Bull the win on a weekend it clearly had the best package - prompted a lot of questions about his temperament.
After a run of incidents and accidents at the start of 2018, Verstappen's moment of Monaco madness - in which he pushed too hard when he didn't have to - left some wondering if he would ever attain the maturity needed to know when to back down. After all, Verstappen's brilliance was that he was supposed to operate at 100% all the time.