Dellacqua came into 2011 having not played since the 2010 Wimbledon Championships because of injury. Her first tournament back from injury was the doubles at the $25,000 Burnie, Tasmania tournament partnering Isabella Holland. The pair reached the second round. Dellacqua then played another four $25,000 tournaments in Australia. Playing singles in the last three. In her first singles match back from injury in Mildura she was beaten by compatriot and doubles partner Olivia Rogowska. Dellacqua again losing first round the next week to Sacha Jones in Ipswich. In her final of the five straight $25,000 Australian tournaments, although having a bad start, Dellacqua defeated country woman Viktorija Rajicic. This was her first singles win in over a year. Dellacqua grew a lot confidence from this win and went on to win the tournament defeating doubles partner Olivia Rogowska in the final in straight sets. Dellacqua had major success in the doubles in these tournaments. Her and partner Olivia Rogowska went on a 16 match winning streak and won four straight tournaments. Her next tournament was her first WTA maindraw since the 2010 Wimbledon, in Estoril as a player under protected ranking. Her first round opponent was Zhang Shuai, whom she defeated in two sets. This was her first WTA main-draw match win since the 2010 Australian Open. Dellacqua lost to fellow Australian Jarmila Gajdošová in the second round. Dellacqua lost in the first round of qualifying for the Madrid Open to Anastasia Rodionova. Retired Australian Doubles great Rennae Stubbs came out of retirement to help former top-10 doubles player Dellacqua on her comeback from injury and played with her in numerous tournament up until the US Open. Their first tournament together was in the Madrid Open. They reached the semifinals defeating fourth seeds Lisa Raymond and Liezel Huber in straight sets along the way. This result put Dellacqua back in the top 120 doubles players. After failing to qualify in the Rome Masters, and Dellacqua and Stubbs unable to pack up their good doubles form from Madrid, her next tournament was the 2011 Brussels Open. In this tournament, Dellacqua used her protected ranking to avoid qualifying for a spot in the main draw. This move paid off as Dellacqua caused a big upset to world No. 20 and fifth seed Shahar Pe'er in the first round. This was Dellacqua's sixth victory against a top-20 player in her career.