ANSWER: RITA
The completed head-to-head matchup table is shown below.
| Paul | Rita | Sarah | Tim | |
| Paul | ---------- | RITA | SARAH | PAUL |
| Rita | ---------- | ---------- | RITA | RITA |
| Sarah | ---------- | ---------- | ---------- | SARAH |
| Tim | ---------- | ---------- | ---------- | ---------- |
Rita gets 3 points
Sarah gets 2 points
Paul gets 1 point
Tim gets 0 points