| Club: | Lazio |
| Season: | 1998–99 |
| Owner: | Sergio Cragnotti |
| Chairman: | Sergio Cragnotti |
| Chrtitle: | President |
| Manager: | Sven-Göran Eriksson |
| Stadium: | Stadio Olimpico |
| League: | Serie A |
| League Result: | 2nd |
| Cup1: | Supercoppa Italiana |
| Cup1 Result: | Winners |
| Cup2: | Coppa Italia |
| Cup2 Result: | Quarter-finals |
| Cup3: | UEFA Cup Winners' Cup |
| Cup3 Result: | Winners |
| League Topscorer: | Marcelo Salas (15) |
| Season Topscorer: | Marcelo Salas (24) |
| Leftarm1: | 86AFD7 |
| Body1: | 86AFD7 |
| Pattern B1: | _sslazio199899h |
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| Socks1: | 94bbd2 |
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| Pattern B2: | _sslazio199899a |
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| Leftarm2: | FFEF00 |
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| Prevseason: | 1997–98 |
| Nextseason: | 1999–2000 |
Società Sportiva Lazio finished second in Serie A, and won the UEFA Cup Winners' Cup and Supercoppa Italiana.
Lazio kicked off the 1998–99 season by defeating Juventus 2–1 to win the Supercoppa in the pre-season, and then set a searing pace in the league thanks to the lethal striking partnership of world transfer record signing Christian Vieri and Marcelo Salas. The pair of them together netted 27 goals, as Lazio led the way for most of the season. Twenty-year-old Yugoslav starlet Dejan Stanković also impressed by scoring on his league debut.
Milan peaked late during the season, while Lazio had a barren spell, which enabled Milan to make up the deficit. Lazio finally squandered the title lead in the penultimate match of the season, where it had to settle for a draw against Fiorentina away from home.
Following the season, Vieri left the club for Inter, accusing chairman Sergio Cragnotti of lying to him. The money from Vieri's transfer was used to bring Juan Sebastián Verón, Simone Inzaghi and Diego Simeone to Rome, moves that all proved essential when Lazio clinched the title in 2000, where those three found the net in the last game of the season.
Lazio's best moment of the 1998-99 season came when they beat Mallorca 2-1 at Villa Park in Birmingham in the 1999 UEFA Cup Winners' Cup Final, following goals by Vieri and Pavel Nedvěd.
The most prolific players during the season was captain and centre-half Alessandro Nesta, free-kick specialist Siniša Mihajlović, winger Nedvěd, and the striker pairing of Vieri and Salas.
Squad at end of season[1]
| In | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | from | width=35% | Type |
| FW | |||||||
| FW | |||||||
| MF | FC Barcelona | ||||||
| DF | |||||||
| DF | |||||||
| MF | |||||||
| MF | |||||||
| DF | |||||||
| GK | loan ended | ||||||
| MF | loan ended | ||||||
| MF | loan ended | ||||||
| MF | co-ownership ended | ||||||
| FW | Lecce | loan ended | |||||
| FW | loan ended | ||||||
| FW | co-ownership ended | ||||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
| FW | |||||||
| DF | |||||||
| MF | |||||||
| MF | |||||||
| DF | |||||||
| MF | |||||||
| MF | Mirko Laurentini | ||||||
| MF | |||||||
| GK | retired | ||||||
| GK | loan | ||||||
| FW | loan | ||||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
| DF | |||||||
| FW | |||||||
| FW | |||||||
| DF | Livorno | loan | |||||
| MF | loan | ||||||
| In | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | from | width=35% | Type |
| DF | |||||||
| MF | |||||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
| MF | |||||||
| FW | |||||||
See main article: 1998–99 Serie A.
See main article: 1998–99 Coppa Italia.
See main article: 1998–99 UEFA Cup Winners' Cup.
See main article: 1999 UEFA Cup Winners' Cup Final.
See main article: 1998 Supercoppa Italiana.
Marcelo Salas 15 (2)
Christian Vieri 12 Roberto Mancini 10