Nigeria's Osimhen, Serie A's top scorer with 21 goals, was sidelined for this month's league games against Milan and Lecce due to a thigh strain.

The league leaders have struggled hugely without him, losing 4-0 to the Rossoneri in Serie A and 1-0 in the Champions League. 

They had more possession and efforts on goal than their opponents in both matches, but weren't able to convert their chances. 

Given that, it'll be a huge relief to fans to hear Spalleti say he's certain Osimhen will be available for the quarter-final return leg. 

"The chances of him being available are 100% because the work schedule, it was made in that direction," Spalletti told Sky Sports in Italy.

"He was rested today (Wednesday) and in Saturday's match to complete the work done by the doctors, then anything can happen."

Serie A leaders Napoli have never reached the Champions League semi-finals before, and would be the favourites to go one step further if they could do so, with their opponents being either Inter Milan or Benfica.

Inter won the first leg of their tie with their Portuguese opponents 2-0, so an all-Italian semi-final looks likely.