Head to head
1
Hard
6
1
Clay
0
Juan Ignacio Chela's wins on the left · Andy Roddick's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 2007 | Rome Masters | Clay | R16 | Juan Ignacio Chela | 6-0 6-4 |
| 2006 | Cincinnati Masters | Hard | R16 | Andy Roddick | 6-3 6-4 |
| 2005 | Cincinnati Masters | Hard | R16 | Andy Roddick | 7-6(4) 6-2 |
| 2005 | Washington | Hard | R16 | Andy Roddick | 6-4 6-7(4) 6-4 |
| 2004 | Canada Masters | Hard | R16 | Andy Roddick | 6-1 6-4 |
| 2003 | Canada Masters | Hard | R32 | Andy Roddick | 7-6(6) 6-2 |
| 2002 | US Open | Hard | R16 | Andy Roddick | 5-7 6-4 6-4 6-4 |
| 2002 | Miami Masters | Hard | R64 | Juan Ignacio Chela | 6-3 2-6 6-4 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.