Kimi Antonelli topped the timesheets but his Mercedes team-mate struggled at Spa-Francorchamps.
The two-time major champion was adjudged to have improved his stance as he attempted to escape from the rough earlier in his round.
Asher Opoku-Fordjour and Chandler Cunningham-South were targeted by a small group of fans during England’s 22-17 victory in San Juan a year ago.
Sobers made 93 Test appearances for the Windies across 20 years.
Impressive Dante winner was one of many to disappoint on soft ground at Epsom.