In the Italian Serie A1 week four of the 2018 season was played. The duel between Unipol Bologna and T&A San Marino needed ten innings in both ends of the two-game set with Bologna prevailing 3-0 and 6-5. Parmaclima downed Tommasin Padua twice, while Citta di Nettuno swept the city duel against Angel Service Nettuno. Rimini and Padule split a doubleheader.
Results:
| Rimini vs Padule | 12/05 (15.30) a Rimini |
12/05 (20.30) a Rimini |
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| Angel Service vs Città di Nettuno | 11/05 (20.30) a Nettuno |
12/05 (20.30) a Nettuno 1–11 (7°)
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| UnipolSai – T&A | 11/05 (19.00) a Serravalle 3–0 (10°)
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12/05 (20.00) a Bologna 6–5 (10°)
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| Parmaclima – Tommasin | 11/05 (20.30) a Padova |
12/05 (20.30) a Parma 10–0 (7°)
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Standings:
| GP | W | L | .PCT | GB | L10 | RS | RA | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rimini | 8 | 7 | 1 | .875 | — | 7-1 | 44 | 15 | |||||||||||
| UnipolSai | 8 | 7 | 1 | .875 | — | 7-1 | 45 | 19 | |||||||||||
| Parmaclima | 8 | 5 | 3 | .625 | 2.0 | 5-3 | 36 | 21 | |||||||||||
| T&A | 8 | 4 | 4 | .500 | 3.0 | 4-4 | 32 | 26 | |||||||||||
| Città di Nettuno | 8 | 4 | 4 | .500 | 3.0 | 4-4 | 45 | 37 | |||||||||||
| Tommasin | 8 | 2 | 6 | .250 | 5.0 | 2-6 | 27 | 33 | |||||||||||
| Padule | 8 | 2 | 6 | .250 | 5.0 | 2-6 | 13 | 49 | |||||||||||
| Angel Service | 8 | 1 | 7 | .125 | 6.0 | 1-7 | 23 | 65 | |||||||||||