Head to head
2
Hard
4
0
Grass
2
3
Carpet
6
Robert Lutz's wins on the left · Stan Smith's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (17)
| 1981 | Milan WCT | Carpet | R32 | Stan Smith | 6-3 6-2 |
| 1979 | Cleveland | Hard | SF | Stan Smith | 6-4 6-4 |
| 1977 | Wembley | Carpet | R32 | Robert Lutz | 4-6 6-3 7-5 |
| 1977 | San Francisco | Carpet | R16 | Robert Lutz | 6-2 6-2 |
| 1976 | Maui | Hard | SF | Robert Lutz | 7-6 6-3 |
| 1976 | Indianapolis WCT | Carpet | QF | Stan Smith | 6-4 7-6 |
| 1975 | Sydney-1 | Hard | F | Stan Smith | 7-6 6-2 |
| 1975 | Tokyo WCT | Carpet | F | Robert Lutz | 6-4 6-4 |
| 1975 | San Antonio WCT | Carpet | SF | Stan Smith | 6-3 4-6 6-2 |
| 1974 | Long Island WCT | Carpet | R16 | Stan Smith | 6-0 6-2 |
| 1973 | Munich WCT | Carpet | QF | Stan Smith | 6-1 6-1 |
| 1973 | Philadelphia WCT | Carpet | F | Stan Smith | 7-6(2) 7-6(5) 4-6 1-6 6-4 |
| 1971 | Los Angeles | Hard | QF | Stan Smith | 6-3 7-6 |
| 1970 | US Open | Grass | R128 | Stan Smith | 1-6 7-6 6-1 6-4 |
| 1969 | Denver | Hard | SF | Stan Smith | 3-6 6-2 6-3 |
| 1969 | Denver | Hard | RR | Robert Lutz | 6-3 |
| 1969 | Boston-2 | Grass | F | Stan Smith | 9-7 6-3 6-1 |
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.