McLaren has won the Chinese Grand Prix three times before, but can they score a fourth this weekend?
Top 6 of today's free practice result were claimed by Mercedes-powered teams.
The german driver took the win by over 25 seconds.
Kovalainen told the Finnish newspaper Turun Sanomat he also cannot be sure that McLaren's gamble on Magnussen will pay off.
"I even did a deal and shook hands with a team principal up and down this paddock - an absolute deal - but he stepped back" - Martin Whitmarsh.
Button admitted he was surprised to hear of McLaren's decision.
Martin Whitmarsh: "There will be some new sponsors."
According to Blick newspaper, Hulkenberg and his manager Werner Heinz are having "sleepless nights".
When Kevin Magnussen won the Formula Renault 3.5 championship this past weekend, his future in Formula One fairly secured.
"Certainly Kevin has impressed in the tests he has done, and as a team that has brought young drivers into Formula One, he is in the frame" - Graeme Lowdon
All Formula One teams except for Mercedes tested a new range of Pirelli tyres at the Silverstone circuit during the three-day Young Drivers Test.
Gary Paffett: "So it’s great to get back in the car – it’s invaluable for us to make sure we are going in the right direction.”
Kevin Magnussen topped the timesheets for McLaren at the end of the first day of the F1 Young Driver Test at Silverstone. Several of the Formula One current and reserve drivers were on hand along with testing Pirelli tyres.
A good way to celebrate a special anniversary is to be at a glorious event with the racing machines from the past while remembering Bruce McLaren.