| 22‑Jun‑2009 | Wimbledon | Grass | R128 | 89 | 12 | (13)Robin Soderling [SWE] d. Muller | 6-7(4) 7-5 6-1 6-2 | | 0.72 | 15.5% | 3.6% | 61.8% | 75.0% | 50.0% | 3/8 | 2:06 |
| 14‑Jun‑2009 | s Hertogenbosch | Grass | R32 | 92 | 81 | Ivan Navarro [ESP] d. Muller | 7-5 7-5 | | 0.98 | 8.1% | 3.2% | 58.1% | 75.0% | 73.1% | 2/4 | 1:24 |
| 8‑Jun‑2009 | Queen's Club | Grass | R32 | 95 | 52 | (16)Guillermo Garcia Lopez [ESP] d. Muller | 7-6(3) 6-3 | | 0.73 | 5.3% | 4.0% | 58.7% | 72.7% | 38.7% | 7/10 | 1:28 |
| 8‑Jun‑2009 | Queen's Club | Grass | R64 | 95 | 199 | Muller d. (WC)Joshua Goodall [GBR] | 6-3 7-6(7) | | 1.22 | 31.9% | 7.2% | 72.5% | 86.0% | 52.6% | 4/4 | 1:23 |
| 1‑Jun‑2009 | Nottingham CH | Grass | R32 | 79 | 163 | Edouard Roger Vasselin [FRA] d. (1)Muller | 6-4 6-4 | | | | | | | | | |
| 25‑May‑2009 | Roland Garros | Clay | R128 | 79 | 42 | Mikhail Youzhny [RUS] d. Muller | 7-6(2) 6-1 6-4 | | 0.40 | 10.0% | 1.1% | 63.3% | 66.7% | 51.5% | 5/8 | 1:52 |
| 13‑Apr‑2009 | Johannesburg CH | Hard | R32 | 85 | 243 | Fernando Vicente [ESP] d. (2)Muller | 6-7(4) 6-4 6-2 | | | | | | | | | |
| 25‑Mar‑2009 | Miami Masters | Hard | R128 | 69 | 47 | Sam Querrey [USA] d. Muller | 6-4 6-3 | | 0.53 | 3.3% | 4.9% | 50.8% | 71.0% | 43.3% | 2/5 | 1:06 |
| 16‑Mar‑2009 | Sunrise CH | Hard | R32 | 70 | 26 | (Q)Robin Soderling [SWE] d. Muller | 6-3 6-1 | | | | | | | | | |
| 23‑Feb‑2009 | Delray Beach | Hard | R16 | 79 | 83 | Guillermo Garcia Lopez [ESP] d. Muller | 5-7 6-3 6-3 | | 0.78 | 14.6% | 1.1% | 66.3% | 66.1% | 43.3% | 5/10 | 2:08 |
| 23‑Feb‑2009 | Delray Beach | Hard | R32 | 79 | 178 | Muller d. (Q)Ryan Sweeting [USA] | 7-6(5) 6-2 | | 1.25 | 22.2% | 5.6% | 58.3% | 83.3% | 40.0% | 4/5 | 1:28 |
| 16‑Feb‑2009 | Memphis | Hard | Q1 | 80 | 122 | Simon Greul [GER] d. (1)Muller | 6-4 6-1 | | | | | | | | | |
| 9‑Feb‑2009 | San Jose | Hard | R32 | 79 | 56 | Kei Nishikori [JPN] d. Muller | 7-5 6-2 | | 0.64 | 5.8% | 7.7% | 53.8% | 60.7% | 54.2% | 2/6 | 1:03 |
| 19‑Jan‑2009 | Australian Open | Hard | R32 | 87 | 6 | (8)Juan Martin Del Potro [ARG] d. Muller | 6-7(5) 7-5 6-3 7-5 | | 0.58 | 12.3% | 5.0% | 64.8% | 69.0% | 44.4% | 20/24 | 3:23 |
| 19‑Jan‑2009 | Australian Open | Hard | R64 | 87 | 768 | Muller d. (WC)Bernard Tomic [AUS] | 3-6 6-1 6-4 6-2 | | 1.59 | 28.1% | 4.2% | 66.7% | 82.8% | 53.1% | 5/6 | 1:58 |
| 19‑Jan‑2009 | Australian Open | Hard | R128 | 87 | 28 | Muller d. (27)Feliciano Lopez [ESP] | 6-3 7-6(5) 4-6 4-6 16-14 | | 1.10 | 0.0% | 0.0% | 100.0% | 76.3% | - | 4/6 | 4:22 |
| 12‑Jan‑2009 | Auckland | Hard | R16 | 95 | 36 | (6)Sam Querrey [USA] d. (Q)Muller | 3-6 6-3 6-4 | | 1.02 | 9.9% | 3.7% | 58.0% | 74.5% | 58.8% | 3/5 | 1:40 |
| 12‑Jan‑2009 | Auckland | Hard | R32 | 95 | 58 | (Q)Muller d. Florent Serra [FRA] | 6-3 6-4 | | 1.66 | 23.1% | 5.8% | 53.8% | 85.7% | 62.5% | 0/1 | 1:04 |
| 12‑Jan‑2009 | Auckland | Hard | Q3 | 95 | 316 | Muller d. Rohan Bopanna [IND] | 6-3 6-2 | | | | | | | | | |
| 12‑Jan‑2009 | Auckland | Hard | Q2 | 95 | 90 | Muller d. Daniel Gimeno Traver [ESP] | 6-4 2-6 6-2 | | | | | | | | | |
| 12‑Jan‑2009 | Auckland | Hard | Q1 | 95 | 84 | Muller d. (5)Nicolas Massu [CHI] | 6-3 6-3 | | | | | | | | | |
| 4‑Jan‑2009 | Brisbane | Hard | Q3 | 94 | 263 | Joseph Sirianni [AUS] d. (6)Muller | 7-6(5) 7-5 | | | | | | | | | |
| 4‑Jan‑2009 | Brisbane | Hard | Q2 | 94 | 147 | (6)Muller d. Mikhail Kukushkin [KAZ] | 7-5 6-7(5) 7-6(4) | | | | | | | | | |
| 4‑Jan‑2009 | Brisbane | Hard | Q1 | 94 | 252 | (6)Muller d. (WC)Colin Ebelthite [AUS] | 6-7(3) 6-4 6-4 | | | | | | | | | |
