How is this calculated?

A team is counted as still in it when at least one set of results for the matches left would put it there, taking into account that its rivals also play each other. It is counted as sure only when no set of results can take it away. Teams level on points are treated cautiously while matches remain: level is enough to stay in, never enough to be sure, because goal difference and the other tie-breaks are only applied once the season is over. Points deductions are included as published in the league table.

Atalanta led Serie A after matchday 18 of 2024-25.

They were level on 41 points with Napoli. Nothing was decided mathematically on this matchday.

Results

Date	Home	Score	Away
28 Dec	Empoli	1–2	Genoa
28 Dec	Parma	2–1	Monza
28 Dec	Cagliari	0–3	Inter
28 Dec	Lazio	1–1	Atalanta
29 Dec	Udinese	2–2	Torino
29 Dec	Napoli	1–0	Venezia
29 Dec	Juventus	2–2	Fiorentina
29 Dec	AC Milan	1–1	Roma
30 Dec	Como	2–0	Lecce
30 Dec	Bologna	2–3	Verona

Table after matchday 18

Pos.	Team	Played	Goal diff.	Points	Max.	Title
1	Atalanta	18	+23	41	101	In it
2	Napoli	18	+15	41	101	In it
3	Inter	18	+27	40	100	In it
4	Fiorentina	18	+19	35	95	In it
5	Lazio	18	+8	35	95	In it
6	Juventus	18	+15	32	92	In it
7	Bologna	18	+5	31	91	In it
8	AC Milan	18	+8	27	87	In it
9	Udinese	18	-5	24	84	In it
10	Roma	18	+0	20	80	In it
11	Torino	18	-5	20	80	In it
12	Empoli	18	-4	19	79	In it
13	Genoa	18	-11	19	79	In it
14	Parma	18	-9	18	78	In it
15	Como	18	-10	18	78	In it
16	Verona	18	-18	18	78	In it
17	Lecce	18	-20	16	76	In it
18	Cagliari	18	-15	14	74	In it
19	Venezia	18	-14	13	73	In it
20	Monza	18	-9	10	70	In it

Max.: the most points the team can still finish on.

Matchdays

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Quick answers

Who was top of Serie A after matchday 18 of 2024-25?: Atalanta led Serie A after matchday 18 of 2024-25. They were level on 41 points with Napoli.
What was decided on matchday 18 of the 2024-25 Serie A?: Nothing was decided mathematically on this matchday.
How is this calculated?: A team is counted as still in it when at least one set of results for the matches left would put it there, taking into account that its rivals also play each other. It is counted as sure only when no set of results can take it away. Teams level on points are treated cautiously while matches remain: level is enough to stay in, never enough to be sure, because goal difference and the other tie-breaks are only applied once the season is over. Points deductions are included as published in the league table.