in the spotlight Tennesse shanic Center world number one opens the 2020 for US Open amidst a swirl of controversy a tale of inadvertent exposure a ban substance and a topical spray all culminate in a complex doping case that leads the tennis world divided twice tested positive for the band substance CL ball Sinner's innocence resides in the hands of his physiotherapist topical spray cleared of Fault by the international tennis Integrity agency the punishment of return prize seems lenient to some inciting criticism and allegations of double standards the cas's handling shrouded in perceived favoritism raises concerns about transparency and consistency in the anti-doping system as centner battles on the court the tennis World battles with the complexities of anti-doping regulations a saga to keep an eye on as the US Open unfolds