| Wimbledon MD | 07/03 12:05 | 24 | Kubot/Melo v Mclachlan/Struff | 4-6,6-3,7-5,7-5 | |
| ATP Halle MD | 06/22 15:30 | 28 | Kubot/Melo v Mclachlan/Struff | 6-4,6-4 | |
| ATP Halle MD | 06/20 13:50 | 27 | Brown/Puetz v Mclachlan/Struff | 6-7,1-6 | |
| ATP Halle MD | 06/18 14:00 | 26 | Ebden/Kudla v Mclachlan/Struff | 4-6,4-6 | |
| ATP Halle MD | 06/18 14:00 | 26 | Zverev/Zverev v Mclachlan/Struff | Cancelled | |
| French Open MD | 05/28 16:30 | 24 | Chardy/Martin v Mclachlan/Struff | 6-3,6-3 | |
| ATP Rome MD | 05/13 12:35 | 25 | Marach/Pavic v Mclachlan/Struff | 6-3,6-3 | |
| ATP Madrid MD | 05/06 11:00 | 25 | Mclachlan/Struff v Kubot/Melo | 5-7,7-5,6-10 | |
| ATP Barcelona MD | 04/20 17:10 | 166 | Mclachlan/Struff v Carballes Baena/Munar | 1-6,6-3,9-11 | |
| ATP Monte Carlo MD | 04/14 15:00 | 25 | Marach/Pavic v Mclachlan/Struff | 5-7,7-6,11-9 | |
| ATP Indian Wells MD | 03/10 23:45 | 26 | Mclachlan/Struff v Klaasen/Venus | 4-6,6-7 | |
| ATP Indian Wells MD | 03/09 00:50 | 25 | Ram/Salisbury v Mclachlan/Struff | 5-7,3-6 | |
| ATP Dubai MD | 03/02 13:00 | 29 | Mclachlan/Struff v Ram/Salisbury | 6-7,3-6 | |
| ATP Dubai MD | 03/01 17:50 | 28 | Mclachlan/Struff v Nedunchezhiyan/Raja | 6-7,6-4,12-10 | |
| ATP Dubai MD | 02/27 14:00 | 27 | Marach/Pavic v Mclachlan/Struff | 5-7,5-7 | |
| ATP Dubai MD | 02/26 14:00 | 26 | Inglot/Skugor v Mclachlan/Struff | 2-6,2-6 | |
| ATP Rotterdam MD | 02/11 15:00 | 26 | Chardy/Kontinen v Mclachlan/Struff | 2-6,6-3,10-5 | |
| Australian Open MD | 01/17 06:15 | 24 | Albot/Jaziri v Mclachlan/Struff | 6-2,3-6,7-6 | |
| ATP Auckland MD | 01/11 23:00 | 29 | Mclachlan/Struff v Klaasen/Venus | 6-3,6-4 | |
| ATP Auckland MD | 01/11 07:05 | 28 | Marach/Pavic v Mclachlan/Struff | 4-6,7-6,9-11 | |
| ATP Auckland MD | 01/10 10:15 | 27 | Mclachlan/Struff v Daniell/Koolhof | 7-6,7-6 | |
| ATP Auckland MD | 01/07 23:00 | 26 | Kubot/Zeballos v Mclachlan/Struff | 6-7,6-2,7-10 | |
| ATP Brisbane MD | 01/02 04:30 | 27 | Millman/Smith v Mclachlan/Struff | 7-6,6-4 | |
| ATP Brisbane MD | 12/31 05:35 | 26 | De Minaur/Hewitt v Mclachlan/Struff | 3-6,1-6 | |
| ATP Paris MD | 10/31 11:40 | 25 | Mclachlan/Struff v Inglot/Skugor | 3-6,4-6 | |
| ATP Antwerp MD | 10/16 14:35 | 26 | Mclachlan/Struff v Gonzalez/Jarry | 5-7,6-2,11-13 | |
| ATP Shanghai MD | 10/11 05:00 | 26 | Klaasen/Venus v Mclachlan/Struff | 6-3,6-3 | |
| ATP Shanghai MD | 10/10 05:00 | 25 | Bopanna/Roger-Vasselin v Mclachlan/Struff | 6-7,3-6 | |
| ATP Tokyo MD | 10/07 04:00 | 29 | Mclachlan/Struff v Klaasen/Venus | 6-4,7-5 | |
| ATP Tokyo MD | 10/05 09:15 | 28 | Haase/Middelkoop v Mclachlan/Struff | 1-6,4-6 |