Napoli and Milan will face tough matches because they will face strong teams in the next five matches so they have to perform as well as possible in facing these matches so as not to lose points. Both are still title contenders at this time even though Milan still has one match left, but if you look at their current points, they are the same if Milan manages to win one remaining match. If one of them makes a mistake, it will actually make their points have a gap again so in the next match both must be careful not to lose points.
Napoli and Milan are facing tough time ahead with strong opponents in their next five matches. To stay in running for title they need to play their best and not lose any points. Both teams are currently tied in points but Milan has one extra game to play which adds more pressure to win. If either team makes mistake it could create gap in standings making it crucial for both teams to be careful and focused in their upcoming matches. One small mistake or loss of focus could be very costly so they need to keep playing intensely and calmly to stay in competition.