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Liberty Media establishes authority over Formula 1 with rule changes for 2019 season
Stefan Edberg interview: Swede great on Roger Federer's longevity, changes that tennis needs and more
Roger Federer, Rafael Nadal urge tennis administrators to exercise caution with rule changes
What will be the impact of two new balls in women's cricket? Top cricketers discuss
Formula 1: From aerodynamics to tyres, all rule changes for 2017 season explained
The objective of the 2017 changes is to make the cars more visually appealing, faster and physically demanding for the drivers.
