Three things to watch during Serie A Matchday 18 as leaders Napoli end Juventus' winning run in emphatic fashion!

Juventus were unable to capitalise on Milan's capitulation against Roma last weekend as the Old Lady saw their run of eight straight wins and eight straight clean sheets obliterated by leaders Napoli on Friday night to fall back to third behind Milan on goals scored, with the Rossoneri travelling to in-form Lecce on Saturday evening. 

That fixture is just one of EIGHT you can watch exclusively live on BT Sport this weekend, so read on for the major Matchday 18 storylines to look out for.

Shaky Milan encounter one of their own

After seeing off Salernitana in their first match following the World Cup, Milan must have felt they were building up some momentum when they led 2-0 against Roma.

However, the Rossoneri were dealt the most gut-wrenching blow late on as Roger Ibanez peeled away from Sandro Tonali to power home on 87 minutes, before Tammy Abraham was quickest to pounce after Nemanja Matic's header was kept out by Ciprian Tatarusanu.

Perhaps this shocking collapse was as much down to a crippling injury list as it was to individual lapses in concentration, but Stefano Pioli may still be without nine first-team players, including goalkeeper Mike Maignan and attackers Divock Origi and Zlatan Ibrahimovic.

Things got worse in midweek as they were knocked out of the Coppa Italia at the last-16 stage by Torino in extra time, and the reigning league champions now head to Lecce hoping to pick up at least a point and consolidate second spot, but they will be up against an opponent that has taken 11 points from the last 15 on offer and has Lorenzo Colombo, on loan from Milan, leading the line. 

The 20-year-old has really come into his own, scoring three and assisting two in his last five top-flight games for the side who won Serie B last season. 

A confident finisher from close range, Colombo has demonstrated his ability to pounce on defensive mistakes and smell where crosses will land.

Every one of his four strikes has come at an important time and he also has the strength of character to respond emphatically to setbacks, as he showed by scoring a screamer at Napoli just minutes after missing a penalty.

Unlike in England, loanees can play against their parent club. Milan beware.

Josh shows he's got that Doig in him

In what has been a depressing season for Hellas Verona and their fans, the form of Scottish left-back Josh Doig, signed in the summer from Hibernian, has been a source of some solace. 

The 20-year-old underlined what he's all about in Monday's vital 2-0 win over Cremonese when he produced a lung-busting run from well inside his own half to the edge of the visitors' penalty area and then played a lovely measured pass for Darko Lazovic to bag his second of the evening. 

Although Inter are most certainly a cut above Cremonese, Doig will be optimistic that he can exploit the Nerazzurri's tendency to play a back three, no matter if they opt for Matteo Darmian or Denzel Dumfries at right wing-back. 

Verona are still six points adrift of safety, but Simone Inzaghi's side do look vulnerable at the moment, possessing the worst defence in the top 10, which appears jittery when forced to defend crosses coming into their box. 

That was how Monza profited deep into stoppage time last weekend, while second-tier Parma were on top of Inter for long spells of their Coppa Italia clash on Tuesday before eventually succumbing to the favourites. 

However, Verona have the second-worst rearguard in the entire league, one that needs to work out a way to stop Lautaro Martinez, who has scored in each of his last two games. 

Only Osimhen sits ahead of the World Cup winner in the division's scoring charts this season. This would be an ideal opportunity to add to his tally. 

Lax Lazio need boost in UCL quest

Heading into the World Cup break, Lazio were holding onto the fourth and final Champions League spot despite suffering a 3-0 loss to Juventus. 

On their return to action, games against Lecce and Empoli, although tricky, were not the sort of fixtures that should intimidate a side with ambitions of dining at European football's top table. 

However, defensive sloppiness saw a 1-0 lead soon turn into a 2-1 deficit in the first of those matches, while in the second, a 2-0 advantage evaporated late on as Lazio were forced to accept a draw in front of a stunned Stadio Olimpico. 

Maurizio Sarri's men now head into a meeting with Sassuolo needing three points, with city rivals Roma and Atalanta sitting on the same number of points as the Eagles and Inter three points ahead of them. 

Mercifully for Lazio, their upcoming opponents are on a woeful run of form. 

Having taken just one point from their last six games, the Neroverdi have unexpectedly been dragged into a relegation battle and while they still sit seven points clear of 18th-placed Hellas Verona, both Verona and 19th-placed Sampdoria are looking better than Sassuolo right now. 

Can Alessio Dionisi's charges secure their first win since 24 October?

Your Serie A weekend on BT Sport

Saturday

Lecce vs Milan (5.15pm on BT Sport 1)

Inter vs Hellas Verona (7.30pm on BT Sport 1)

Sunday

Sassuolo vs Lazio (11.30am on BT Sport 3)

Udinese vs Bologna (2pm on BT Sport 3)

Torino vs Spezia (2pm on BT Sport 6)

Atalanta vs Salernitana (5pm on BT Sport 3)

Roma vs Fiorentina (7.45pm on BT Sport 1)

Monday 

Empoli vs Sampdoria (7.30pm on BT Sport 1)