IndyCar driver Justin Wilson has died as a result of the injuries he suffered in an accident during a race on Sunday.
The Sheffield-born former Formula One driver, who was competing for Andretti Autosport, sustained a head injury when Sage Karam's car crashed in front of him during a race at the Pocono Raceway .
Here, Press Association Sport looks at some of the tributes paid to the 37-year-old on Twitter on Tuesday.
Stefan Wilson, Justin's brother and fellow IndyCar driver: " Can't even begin to describe the loss I feel right now. He was my Brother, my best friend, my role model and mentor. He was a champion!
"He never stopped giving & caring for others. Even at this time. He had pre-chosen to donate his organs to help others in need. #myherojw
"I often told him, I just want to grow up to be half the man he is, as that will make me a pretty good man.
"He lived for this sport, he loved it. The only comfort I feel is that he lived a life he loved! RIP mate, I'll chuffing miss you.
"He loved our parents, his wife Julia & his kids Jane & Jess! Thats where we need to send love and prayers. Thanks for all your messages."
McLaren F1 driver Jenson Button: "The motorsport World comes 2 a standstill once again. @justin_wilson was a great person & racing driver. My thoughts are with his family RIP. I raced with Justin as far back as 1989 in Karting and remember his smile was infectious, such a lovely guy. #RIPJustin"
Mark Webber, Australian former F1 driver, now competing in World Endurance Championship: "Last night a very good man left us. Mate. So sorry. RIP Justin. My thoughts are with your loved ones."
Juan Pablo Montoya, Colombian IndyCar and former F1 driver: "Tough day in motorsport today as we loose another great person and driver. RIP Justin. You will be miss. Thoughts and prayers for his family"
Indian Formula E driver Karun Chandhok: "Very sad news this morning about @justin_wilson.Showed real tenacity in junior formula to get to F1. Was such a nice guy. #RIPJustinWilson"
Nick Heidfeld, German former F1 driver, now competing in World Endurance Championship: "Terrible news of Justin Wilson not being with us any more. My thoughts are with his family."
Lucas di Grassi, Brazilian World Endurance Championship driver: "Sad news this morning. Rest well Justin, good recently memories from Moskow race #JustinWilson #RIP. And @IndyCar, think about closed canopies as an option, like LMP1. Its not only safer, it is more aero efficient, therefore, the future."
Source: PA
