Toto Wolff remains hopeful of keeping Lewis Hamilton at Mercedes but admits he's not entirely in control of the deal. The Austrian team boss explains how important the six-time world champion is within the team.  The youngsters Charles Leclerc and Max Verstappen have both signed mega contract extension which will see them remain at their teams through the 2021 rules and regulation overhaul. Now, all the contract speculation and attention turns towards the older generation: Hamilton and Sebastian Vettel.  Read more Barrichello: 'Hamilton has more talent than Schumacher and Senna' There's always that question mark over Hamilton asking if he'll ever move to Ferrari? Hamilton's...
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