By Euan Burns One of the most intriguing 2023/24 Champions League last-16 ties sees the champions of Spain and Italy collide when Napoli meet Barcelona. The Diego Maradona connection makes this European clash all the more special and the clubs have been recent opponents in recent times, last squaring off in the 2021/22 Europa League when Barca were victorious. The two sides would go on to claim their respective national league titles the following season, but moods have dropped so far in 2023/24, with neither champion in contention to retain their crown. Barca’s defence of La Liga has fallen a…