The 2018 Italian Open[3] (also known as the 2018 Rome Masters and sponsored title 2018 Internazionali BNL d'Italia) was a professional tennis tournament played on outdoor clay courts at the Foro Italico in Rome, Italy from 14 to 20 May 2018.

It was the 75th edition of the Italian Open and it is classified as an ATP World Tour Masters 1000 event on the 2018 ATP World Tour and a Premier 5 event on the 2018 WTA Tour.

Seedings are based on ATP rankings as of 7 May 2018.

The following players would have been seeded, but they withdrew from the event.

The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: The following players received wildcards into the main draw: The following players received entry using a protected ranking: The following players received entry from the qualifying draw: The following players received entry as lucky losers: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: