Senna, in his first season driving for Lotus after his breakthrough years at Toleman and Lotus's predecessor deals, led for much of the race, but Nigel Mansell's Williams-Honda closed the gap relentlessly in the closing laps, the two cars running close enough that a single defensive move or late braking mistake from either driver could have decided it. Mansell threw everything at the final lap, pulling alongside Senna's Lotus as they approached the line.
The photograph from the finish line became one of the most reproduced images in Formula 1 history: the two cars so close together that it took the official timing equipment, not the naked eye, to separate them. Senna held on by 0.014 of a second — a gap smaller than the length of either car's own nose cone, decided by a margin that in almost any other sport would be called a dead heat.
The finish became an instant point of reference for just how close Formula 1 racing could get, repeatedly cited for years afterward whenever a tight finish needed a historical benchmark to be measured against.