| Ronaldo | |
| Fullname: | Ronaldo Marques Sereno |
| Birth Date: | March 14, 1962 |
| Birth Place: | Brazil |
| Position: | Forward |
| Years1: | 1980–1983 |
| Caps1: | 32 |
| Goals1: | 7 |
| Years2: | ? |
| Clubs2: | ? |
| Caps2: | ? |
| Goals2: | ? |
| Years3: | 1994 |
| Caps3: | 21 |
| Goals3: | 5 |
| Years4: | ? |
| Clubs4: | ? |
| Nationalyears1: | 1981 |
| Nationalteam1: | Brazil U-20 |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 3 |
| Ntupdate: | February 18, 2009 |
| Pcupdate: | February 18, 2009 |
Ronaldo Marques Sereno, also known as Ronaldo (born March 14, 1962, is a former Brazilian footballer who played as a forward.He was a member of the squad of 1981 FIFA World Youth Championship[1]
He played for Ulsan Hyundai of the South Korean K League, then known as Hyundai Horangi.