Switzerland club FC Lugano published the news on their official website on Thursday.
Seven other Lugano players also tested positive for coronavirus.
“The management of FC Lugano announces that the tests carried out following the positivity of Mattia Bottani also highlighted the positivity of the goalkeeper Sebastian Osigwe,”reads a statement on Lugano’s official website.
Osigwe is expected to self-isolate for at least ten days after which another test will be carried out on him to detect his state of health.
It must be recalled that goalkeeper was on Thursday named in Nigeria’s squad for the 2022 Africa Cup of Nations qualifying double-header against the Leone Stars of Sierra Leone.
The 26-year-old has made four league appearances for Lugano this season.