FIFA president Gianni Infantino has said March's international soccer matches could be threatened by the coronavirus but was hopeful that this year's European Championship tournament and the Olympic Games will go ahead unaffected.

On Friday, six countries reported their first cases of the virus and the World Health Organisation (WHO) raised its global spread and impact risk alert to "very high".

Players from Bulgarian team Ludogorets get on a coach heading for the San Siro Stadium in Milan. Credit:AP

The spread of the virus has already hit sporting events and on Thursday Italian club Inter Milan were forced to play their Europa League home match against Bulgarian side Ludogorets at San Siro behind closed doors.

A number of international fixtures, including the Euro 2020 playoffs as well as friendlies, are scheduled for the final week of March. Asked whether he would consider halting those games, Infantino said nothing was out of the question.