Ajax fans stabbed before Milan clash
Ajax players attend a training session on the eve of the group H Champions League football match AC Milan vs Ajax, on December 10, 2013 at San Siro Stadium in Milan
Domestic news agency ANSA said the fans had been stabbed in separate incidents close to the San Siro stadium and were being treated in the city's San Carlo Hospital.
One fan, who had been stabbed in the buttocks, is not in danger while the other was in a "serious" condition after being stabbed in the stomach, according to the report.
Fans of the Dutch side were involved in scuffles earlier in the day in Milan, notably when Ajax fans fought with a group of demonstrators who had congregated near Piazza Loreto.
Hundreds of police, most with riot gear, were deployed around the stadium and were shepherding Ajax fans into special buses as soon as they exited the metro at Piazza Lotto, according to an AFP reporter at the scene.
AC Milan require only a draw against Ajax to advance to the last 16 of the Champions League while Ajax need a win if they are to jump up to second place in Group H and join already qualified Barcelona in the knockout phase.