San Diego attacked the line when runner-up behind the in-form Music Magnate in a 1400m Open Handicap and stopped the clock at 11 seconds flat for his final furlong.
Godolphin's five-year-old gelding is a monster to look at and whilst reasonably forward in condition for last Saturday's assignment, will strip fitter second and third-up.
The fastest final 600m of the day went to Michelle Ritchie's Better Not Blue.
With a lightweight of 53kg, the four-year-old gelding broke 33 seconds for the final 600m in clocking 32.76 when runner-up in a 1200m Benchmark 85 event.
A lightly raced galloper still learning the trade, he is a horse which can be blackbooked and importantly handles all conditions.
Below is a table summarising the fastest final 600-metres and 200-metre splits at Randwick on Saturday.
| Race | Fastest Last 600m | Fastest Last 200m |
| 1 - Kirkham Plate 2YO (1000m) | Zafina (33.68) | Zafina (11.68) |
| 2 - Benchmark 70 (1400m) | Montauk (33.96) | Denpurr (11.58) |
| 3 - Benchmark 85 (1200m) | Better Not Blue (32.76) | Better Not Blue (11.18) |
| 4 - Open Handicap (1400m) | San Diego (33.06) | San Diego (11.00) |
| 5 - Benchmark 83 (2000m) | Soviet Courage (33.86) | Scherzoso (11.46) |
| 6 - Spring Champion Stakes (2000m) | Vanburgh (34.68) | I'm Belucci (11.98) |
| 7 - Angst Stakes (1600m) | Zarzali (34.26) | Casino Dancer (11.64) |
| 8 - Benchmark 85 (1600m) | Frespanol (34.24) | Frespanol (11.68) |