Sinner, who faces Novak Djokovic in the final, first reached top spot during the French Open in June and has not relinquished it since, becoming the first Italian to achieve the feat.
Stewards at the Brazilian race summoned Leclerc on Friday, acting on a report from the governing FIA's media delegate and after reviewing a written transcript.
De Rossi is loved by Roma fans as a local boy turned World Cup winner who played almost his entire career for his hometown club.
England captain Harry Kane launched a scathing attack on the stay-aways, insisting international duty should come before anything else.
PR Sreejesh will make his debut as head coach for the 18-member junior hockey squad at the Sultan of Johor Cup.