While in Mexico for a Davis Cup tie as a team hitting partner, he woke up sleepwalking and jumped or fell from a three-story room suffering serious injuries.

Peter began 2007 with a bang as he won three of four Futures in Central America in January: El Salvador F1, Guatemala F1, and Costa Rica F1.

A second straight appearance as a wild card at the Rogers Cup ended with the same first round loss, this time to Fabio Fognini.

Polansky went 9 wins, 7 losses on the autumn American challenger circuit, his best results were reaching the semifinals of one tourney and the quarters of two others; at Waco, where he lost in three tight sets to top seed Vince Spadea; and in Louisville, Kentucky, where he defeated World No.

He next in February failed to qualify for the main draw of the 2009 SAP Open as well as 2009 Delray Beach International Tennis Championships.

Polansky had to withdraw from the Canadian Davis Cup team for their tie against Ecuador in early March due to a small tear detected in a right rotator cuff tendon as well as one in his labrum [1].

Following the French, Polansky lost convincingly to Simone Vagnozzi in the first round of Zenith Tennis Cup on red clay in Milan.

He followed upon this by reaching the quarterfinals of the Lines Trophy, defeating Nicolás Massú in the second round before falling to veteran Jean-René Lisnard in straight sets.

After taking the following week off Polansky won the opening rubber of the Davis Cup tie away to Peru, defeating Iván Miranda in straight sets.

After a week off, the unseeded Polansky reached the semi-finals of the Granby Challenger, defeating José de Armas, Tobias Kamke, and Lester Cook before falling to No.

Despite not playing in any tournament main draws the week after, Polansky rose three ranking spots to sit at World No.

As the No.3 seed at the Challenger ATP Club Premium Open, he reached he quarter-finals, while in doubles he and partner Sebastián Decoud lost in the first round.

The following week Polansky lost to No.1 seed Pablo Cuevas in the first round of the Uruguayan's home tournament, the Copa Petrobras.

Polansky failed to qualify for the Copa Telmex, losing to eighth seed Rubén Ramírez Hidalgo in the first round, in a close third-set tiebreaker.

The following week, Polanksy lost in the first round of qualifying for the Delray Beach ATP 250 tournament, to fifth seed Paul Capdeville, in straight sets.

Coach Martin Laurendeau opted to play Steven Diez in the reverse singles, as Canada lost the tie 1–4.

In June, Polansky reached the second round of the 2010 Weil Tennis Academy Challenger, defeating fellow Canadian Pierre-Ludovic Duclos, before falling to Marinko Matosevic.

Then that week, unseeded at the 2010 Camparini Gioielli Cup, he beat Laurent Recouderc before losing to fifth seed and eventual runner-up Pablo Andújar.

After a couple of weeks off, Polansky reached the second round of the 2010 Comerica Bank Challenger, defeating sixth seed Kevin Kim, before falling to qualifier Brydan Klein.

In July, Polansky, as the eighth seed in singles at the 2010 Challenger Banque Nationale de Granby, lost to world no.

The following week Polansky lost to top seed Taylor Dent in the first round of the 2010 Odlum Brown Vancouver Open in three sets.

The next week, he appeared in the singles main draw of the 2010 Rogers Cup, having been granted a wild card, where he faced and beat no.

The following week, he reached the second round of the 2010 Chang-Sat Bangkok Open 2 in singles, defeating a Thai wild card entrant before falling to Sebastian Rieschick.

Then, the following week, he lost to eighth seed Rajeev Ram in the first round of qualifying for the 2010 Rakuten Japan Open Tennis Championship.

Polansky began his 2017 season playing a challenger event in Happy Valley, Australia by reaching the quarterfinals before losing to Omar Jasika, who lost in the final.

Polansky returned to Canada to play the Canadian summer circuit including challengers in Winnipeg, Gatineau and Granby in July and he was defending a lot of points from 2016.

In the three tournament run, he beat Malek Jaziri, Brayden Schnur, Frank Dancevic and Denis Shapovalov and reached a career high ranking of 115.

He followed up with a direct entry main draw performance in Los Cabos, where he beat Yasutaka Uchiyama for the third time in the month.

He had some success playing challengers, reaching the semifinals in Gwangju, South Korea and the quarterfinals in Ningbo, China and in Ho Chi Minh City.

Polansky failed to qualify for the 2018 Miami Open falling in the second round to Rogério Dutra Silva in three close sets.