Head announces long-term contracts with two of its top stars.
First daughter calls on WTA to change its rule "immediately."
King of Clay has quite a silverware collection.
The sisters have not won a major doubles title since Wimbledon, 2016.
The Swiss maestro heads a group of 12 tennis players on the annual list.
The Spaniard adds Evian to her growing cache of endorsement deals.
Hall of Famer believes Serena Williams is a major favorite, but not at Roland Garros.
