| Date: | 15 – 20 July |
| Edition: | 2nd |
| Location: | Worple Road SW19, Wimbledon, London, United Kingdom |
| Venue: | All England Croquet and Lawn Tennis Club |
| Surface: | Grass |
| Category: | Grand Slam |
| Champs: |  Frank Hadow |
The 1878 Wimbledon Championships took place on the outdoor grass courts at the All England Lawn Tennis and Croquet Club in Wimbledon, London, United Kingdom. The tournament ran from 15 July until 20 July. It was the 2nd staging of the Wimbledon Championships, and the first Grand Slam tennis event of 1878. There were 34 competitors, excluding Spencer Gore who as champion was not required to participate until the best of the challengers had won the All comers' final. The winner of the All Comers' final was Frank Hadow, a planter from Ceylon who was on leave in Britain. He defeated Robert Erskine, a friend of the family who had enticed him to participate in the championship, in straight sets 6–4, 6–4, 6–4.[1] On 18 July 1878 Hadow defeated reigning champion Spencer Gore in three sets, 7–5, 6–1, 9–7 before a crowd of about 700 spectators.[2] [3] Hadow effectively introduced the tactic of lobbing to counter Gore's volleying game.[1] [4]
The height of the net was reduced from 5feet at the posts and 3inchesft3inchesin (ftin) in the middle to 4inchesft9inchesin (ftin) at the posts and 3feet in the middle. The distance of the service line from the net was reduced from 26feet to 22feet. Arthur Myers was the first player to serve over hand.[5]
See main article: 1878 Wimbledon Championship – Singles. Frank Hadow defeated Spencer Gore, 7–5, 6–1, 9–7 [6]
Frank Hadow defeated Robert Erskine, 6–4, 6–4, 6–4 [7]