PREVIEW: Three drivers have completed all laps

FORMULA 1 - The F1 season makes a stop at Belgium’s Spa-Francorchamps track for the annual Grand Prix of Belgium. Only three drivers have completed the maximum of 686 laps in the previous 11 races of the 2012 F1 season.

> The three drivers that have completed all 686 laps so far are Fernando Alonso (Ferrari), Nico Rosberg (Mercedes) and Kimi Räikkönen (Lotus - Renault).

> Remarkably, the two drivers completing fewest laps are teammates of two of the three leaders. They are Romain Grosjean (Lotus - Renault, 480 laps), Michael Schumacher (Mercedes, 487 laps) and Pedro de la Rosa (HRT - Cosworth, 487 laps).

> Michael Schumacher has retired from six of 11 Grands Prix in 2012, the most by any driver this season. Next in line are Romain Grosjean and Narain Karthikeyan (HRT - Cosworth) with four retirements each.

> The six retirements by Michael Schumacher are more than the five in the entire previous season and is one shy of his most within a season. In 1993, he failed to finish seven Grands Prix driving a Benetton.