Gene Haas has struck back over criticism from rival Formula One teams, suggesting the sport has "a lot of whiners."
Haas's team is off to a fine start to its first season on the grand prix circuit. Driver Romain Grosjean followed a sixth-place finish at the Australian Grand Prix by finishing fifth in Bahrain last time out.
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However, Grosjean expressed frustration at the apparent jealousy of rivals who highlighted close links with Ferrari as a key factor in his early success.