| Open d'Australie - Femmes | 01/18 01:30 | 46 | [102] Nao Hibino v Arruabarrena, L. [152] | 6-1,6-2 | |
| Open d'Australie - Femmes | 01/16 23:00 | 45 | [152] Arruabarrena, L. v Yuki Naito [188] | 6-3,6-4 | |
| Open d'Australie - Femmes | 01/15 23:00 | 44 | [207] Indy De Vroome v Arruabarrena, L. [152] | 3-6,3-6 | |
| WTA Auckland | 01/04 04:55 | 45 | [155] Arruabarrena, L. v Greet Minnen [110] | 3-6,4-6 | |
| Riba - Roja De Turia, Singles W-ITF-ESP-23A | 10/12 09:00 | 28 | [165] Arruabarrena, L. v Andrea Lazaro Garcia [441] | 6-4,3-6,2-6 | |
| Riba - Roja De Turia, Singles W-ITF-ESP-23A | 10/11 08:30 | 27 | [249] Guerrero Alvarez, Eva v Arruabarrena, L. [165] | 6-4,4-6,4-6 | |
| Riba - Roja De Turia, Singles W-ITF-ESP-23A | 10/10 11:30 | 26 | [335] Saez Larra, Olga v Arruabarrena, L. [165] | 4-6,3-6 | |
| Riba - Roja De Turia, Singles W-ITF-ESP-23A | 10/08 11:40 | 25 | [350] Irene Burillo Escorihuela v Arruabarrena, L. [165] | 1-6,2-6 | |
| WTA Seoul | 09/15 05:00 | 64 | [142] Ana Bogdan v Arruabarrena, L. [177] | 6-3,6-2 | |
| WTA Seoul | 09/14 04:30 | 45 | [253] Naiktha Bains v Arruabarrena, L. [177] | 0-6,3-6 | |
| Nanchang, Chine | 09/11 08:15 | 26 | [177] Arruabarrena, L. v Viktorija Golubic [76] | 6-1,0-6,3-6 | |
| Nanchang, Chine | 09/09 07:00 | 25 | [105] Niculescu, Monica v Arruabarrena, L. [155] | Retired | |
| New Haven, USA | 09/04 18:05 | 25 | [118] Varvara Lepchenko v Arruabarrena, L. [155] | 6-1,4-6,6-4 | |
| New Haven, USA | 09/03 17:15 | 24 | [155] Arruabarrena, L. v Hozumi, Eri [438] | 7-6,6-0 | |
| US Open Women | 08/22 18:05 | 45 | [157] Arruabarrena, L. v Timea Babos [112] | 4-6,1-6 | |
| US Open Women | 08/20 20:10 | 44 | [157] Arruabarrena, L. v Katherine Sebov [200] | 6-1,6-2 | |
| WTA Karlsruhe | 07/30 15:10 | 25 | [152] Arruabarrena, L. v Paula Badosa [101] | 3-6,4-6 | |
| WTA Palermo | 07/22 14:00 | 25 | [152] Arruabarrena, L. v Tamara Zidansek [56] | 2-6,3-6 | |
| WTA Bucharest | 07/17 14:10 | 26 | [165] Arruabarrena, L. v Laura Siegemund [77] | 5-7,3-6 | |
| WTA Bucharest | 07/16 12:55 | 25 | [221] Xu, Shilin v Arruabarrena, L. [165] | 5-7,7-6,5-7 | |
| WTA Bastad | 07/09 09:00 | 25 | [197] Mrdeza, Tereza v Arruabarrena, L. [137] | 6-2,2-6,6-3 | |
| WTA - Madrid | 05/05 11:05 | 24 | [110] Arruabarrena, L. v Sara Sorribes Tormo [75] | 4-6,6-3,1-6 | |
| WTA Rabat | 05/01 10:00 | 26 | [110] Arruabarrena, L. v Su-Wei Hsieh [24] | 6-4,5-7,3-6 | |
| WTA Rabat | 04/30 12:00 | 25 | [82] Vera Zvonareva v Arruabarrena, L. [110] | 6-7,5-7 | |
| WTA Istanbul | 04/26 11:45 | 27 | [117] Arruabarrena, L. v Marketa Vondrousova [46] | 1-6,2-6 | |
| WTA Istanbul | 04/24 12:15 | 26 | [117] Arruabarrena, L. v Rebecca Peterson [65] | 6-3,6-2 | |
| WTA Istanbul | 04/23 12:15 | 25 | [27] Suarez Navarro, Carla v Arruabarrena, L. [117] | 4-6,5-7 | |
| WTA - Bogota | 04/13 18:50 | 28 | [106] Arruabarrena, L. v Astra Sharma [138] | 5-7,1-6 | |
| WTA - Bogota | 04/12 16:00 | 27 | [67] Tamara Zidansek v Arruabarrena, L. [106] | 4-6,2-6 | |
| WTA - Bogota | 04/11 17:15 | 26 | [187] Jasmine Paolini v Arruabarrena, L. [106] | 6-7,1-6 |