Insigne late strike sinks Liverpool

The midfielder was substituted in the 19th minute after alerting the Reds' medical team to a pain in his back.

He was taken to a local hospital where he underwent a number of precautionary health checks to assess his condition.

Liverpool is scheduled to remain in Italy until Thursday morning and no decision has been made on when the 23-year-old will be discharged.

Lorenzo Insigne scored in the 90th minute to secure all three points for Napoli and condemn Liverpool to their first Champions League defeat of the campaign.