Celtic have been knocked out of the Champions League, losing 1-0 to Maribor in the second leg of their play-off
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Celtic will compete in the Champions League play-offs after the Court of Arbitration for Sport rejected Legia Warsaw's bid to be provisionally reinstated.
Legia took their case to the Swiss-based court after their punishment for fielding an ineligible player was rejected by UEFA's appeal body on Thursday.
But CAS confirmed on Monday afternoon that it had denied Legia's initial request and that Celtic will play Maribor in Slovenia on Wednesday night.
Napoli coach Rafael Benitez has warned his side not to underestimate Athletic Bilbao when the two sides meet in Tuesday's Champions League play-off in Naples.
– Napoli boss Rafael Benitez speaking to MARCA
We will face a great team and the second leg will be in an incredible (San Mames) stadium. The (San Mames) crowd is like their 12th man.
Athletic's strongest weapon is the group, with players who have been together for many years and have the support of a city that never loses its passion.
I respect Athletic Bilbao a great deal, but I trust my Napoli.
Celtic have retained their place in the Champions League after Legia Warsaw confirmed their appeal against UEFA's decision to exclude them from the competition for fielding an ineligible player had been rejected.