Apr.18 (GMM) Bernie Ecclestone's latest proposal is that F1's most important races become a tennis-like 'Grand Slam'.

Insisting that the calendar will probably not expand much beyond 20 races, the F1 chief executive also admitted that "circumstances change".

Bernie Ecclestone, CEO Formula One Group Photo by: xpb.cc

If that's the case, the most important races could be like international tennis' Slams.

"Absolutely," Ecclestone told Germany's Auto Motor und Sport. "I'm working on it.

"And if it gets that far, then there would be more points for the Grand Slam races."