# 1978 Paris Open – Singles

Corrado Barazzutti was the defending champion but did not compete that year.
Robert Lutz won in the final 6–2, 6–2, 7–6 against Tom Gullikson.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Brian Gottfried (semifinals)
* John Lloyd (first round)
* Stan Smith (first round)
* Robert Lutz (champion)
* Ulrich Pinner (quarterfinals)
* Tom Gullikson (final)
* Ángel Giménez (second round)
* Mark Cox (semifinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking
* NB: The Final was the best of 5 sets while all other rounds were the best of 3 sets.

### Final

| Final | Final | Final | Final | Final | Final | Final |
| 4 | Robert Lutz | 6 | 6 | 7 | | |
| 6 | Tom Gullikson | 2 | 2 | 6 | | |

### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | B Gottfried | 6 | 6 | | | | | | | | | | | | | | | |
| | L Sanders | 4 | 1 | | 1 | B Gottfried | 4 | 7 | 6 | | | | | | | | | |
| | I El Shafei | 3 | 7 | 7 | Q | D Bedel | 6 | 5 | 4 | | | | | | | | | |
| Q | D Bedel | 6 | 5 | 9 | | | | | | 1 | B Gottfried | 6 | 6 | | | | | |
| | A Pattison | 4 | 6 | | | | | | | | R Drysdale | 2 | 0 | | | | | |
| | R Drysdale | 6 | 7 | | | R Drysdale | 7 | 6 | | | | | | | | | | |
| | É Deblicker | 6 | 4 | | 7 | Á Giménez | 5 | 4 | | | | | | | | | | |
| 7 | Á Giménez | 7 | 6 | | | | | | | | | | | 1 | B Gottfried | 6 | 4 | 4 |
| 4 | R Lutz | 6 | 7 | | | | | | | | | | | 4 | R Lutz | 1 | 6 | 6 |
| | Y Noah | 2 | 5 | | 4 | R Lutz | 6 | 6 | | | | | | | | | | |
| | R Moore | 7 | 6 | | | R Moore | 4 | 3 | | | | | | | | | | |
| | G Hardie | 5 | 3 | | | | | | | 4 | R Lutz | 7 | 6 | | | | | |
| | P Dominguez | 5 | 2 | | | | | | | 5 | U Pinner | 6 | 3 | | | | | |
| | O N Bengtson | 7 | 6 | | | O N Bengtson | 6 | 6 | 2 | | | | | | | | | |
| | B Manson | 4 | 4 | | 5 | U Pinner | 4 | 7 | 6 | | | | | | | | | |
| 5 | U Pinner | 6 | 6 | | | | | | | | | | | | | | | |

### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | T Gullikson | 6 | 3 | 6 | | | | | | | | | | | | | | |
| Q | J Källqvist | 1 | 6 | 3 | 6 | T Gullikson | 6 | 6 | | | | | | | | | | |
| | B Fritz | 6 | 7 | | | B Fritz | 2 | 3 | | | | | | | | | | |
| | J James | 4 | 6 | | | | | | | 6 | T Gullikson | 7 | 6 | | | | | |
| | G Moretton | 2 | 3 | | | | | | | | P Proisy | 5 | 3 | | | | | |
| | P Proisy | 6 | 6 | | | P Proisy | 6 | 2 | 6 | | | | | | | | | |
| | V Pecci | 6 | 6 | | | V Pecci | 3 | 6 | 4 | | | | | | | | | |
| 3 | S Smith | 2 | 4 | | | | | | | | | | | 6 | T Gullikson | 6 | 4 | 6 |
| 8 | M Cox | 6 | 6 | | | | | | | | | | | 8 | M Cox | 3 | 6 | 4 |
| | J-F Caujolle | 1 | 3 | | 8 | M Cox | 6 | 6 | | | | | | | | | | |
| | J Soler | 3 | 4 | | Q | M Mir | 2 | 0 | | | | | | | | | | |
| Q | M Mir | 6 | 6 | | | | | | | 8 | M Cox | 7 | 6 | | | | | |
| | P Portes | 6 | 4 | 2 | | | | | | | J Austin | 6 | 4 | | | | | |
| | J Austin | 1 | 6 | 6 | | J Austin | 4 | 6 | 6 | | | | | | | | | |
| Q | J-L Haillet | 4 | 6 | 6 | Q | J-L Haillet | 6 | 2 | 4 | | | | | | | | | |
| 2 | J Lloyd | 6 | 1 | 1 | | | | | | | | | | | | | | |