At the end of the 2014 season, Radwańska hired Martina Navratilova as part of her coaching team, with the specific goal of winning a Grand Slam title.
She started 2015 by teaming with Jerzy Janowicz to win the Hopman Cup, Poland's first title in the event.
The victory included Radwańska's first win over Serena Williams in a singles match.
Radwańska competed in Sydney, where she defeated Alizé Cornet but lost to Garbiñe Muguruza in the second round.
She reached the fourth round of Australian Open, where she lost to Venus Williams for the first time since 2010, in three sets.

In February, Radwańska played in Dubai and Doha, where she recorded wins over Caroline Garcia and Flavia Pennetta, but lost for the second time in a year to Muguruza and Venus Williams, respectively.
She then progressed to Indian Wells where she lost in the third round to Heather Watson.
After that, she competed in the 2015 Miami Open, where she lost to Carla Suárez Navarro in the fourth round.

In April, Radwańska participated for the second time in her career at Katowice Open in Poland, where she defeated Yanina Wickmayer, An-Sophie Mestach, Klára Koukalová before losing to Camila Giorgi in the semifinals.

Shortly after Radwańska's first-round loss at Stuttgart Open, Martina Navratilova stated that she was too busy to continue in her part-time role as Agnieszka Radwańska's consulting coach.
Radwańska stated, "I just wanted to thank Martina for her time and efforts over these last few months.
It was a great experience to work with one of the all-time greats.
However, we both agreed that as Martina could not commit 100% to the project then it was not going to work as a long-term partnership."

At the Mutua Madrid Open, Radwańska defeated Lara Arruabarrena and Casey Dellacqua before losing to Caroline Wozniacki in the third round.
As a result of this loss, Radwańska dropped outside of the Top 10 for the first time since October 2011.
At the French Open, Radwańska was defeated by Annika Beck in the first round.
The loss marked only her third first-round loss at a Grand Slam in her career, and her first since the 2009 Australian Open.
In June, Radwańska competed in her first grass tournament at Aegon Trophy in Nottingham.
She advanced to the semifinals at the Aegon Open Nottingham, losing to Monica Niculescu.
In her next grass tournament at Aegon International in Eastbourne, Radwańska defeated Irina Falconi, Karolína Plíšková, and Tsvetana Pironkova to reach the semifinals of a grass event for the second time in three weeks, after doing so at Nottingham.
After defeating Sloane Stephens, Radwańska reached her first final of the season against Belinda Bencic, who defeated her in three sets to claim her first WTA title.

Radwańska then started her Wimbledon campaign just three days after her final at Eastbourne.
During the first week she defeated Lucie Hradecká, Ajla Tomljanović and Casey Dellacqua, all in straight sets.
She then defeated Jelena Janković and Madison Keys to advance to the semifinals where she faced Garbiñe Muguruza.
In her third Wimbledon semi-final in four years, Radwańska ended up losing the match in three sets.
After her successful run at Wimbledon, Radwańska returned to the Top 10 after she dropped outside in early May this year.

Radwańska began her summer hard court season at the Bank of the West Classic, where she lost a tight three-set match to Angelique Kerber in the quarterfinals.
As the defending champion at the Rogers Cup, Radwańska defeated Julia Görges and Alizé Cornet before losing to Simona Halep in the quarterfinal.
Due to her first round loss at the Western & Southern Open, Radwańska decided to participate at the Connecticut Open, where she defeated CoCo Vandeweghe and Alizé Cornet but lost to Petra Kvitová in the quarterfinals.
At US Open, she defeated Katerina Siniakova and Magda Linette before losing to Madison Keys in the third round.

At the Toray Pan Pacific Open in Tokyo Radwańska defeated Coco Vandeweghe, Elina Svitolina, Karolína Plíšková, Dominika Cibulkova and Belinda Bencic to win her first title of the season.
Radw
At the end of the 2014 season, Radwańska hired Martina Navratilova as part of her coaching team, with the specific goal of winning a Grand Slam title. She started 2015 by teaming with Jerzy Janowicz to win the Hopman Cup, Poland's first title in the event. The victory included Radwańska's first win over Serena Williams in a singles match. Radwańska competed in Sydney, where she defeated Alizé Cornet but lost to Garbiñe Muguruza in the second round. She reached the fourth round of Australian Open, where she lost to Venus Williams for the first time since 2010, in three sets.
In February, Radwańska played in Dubai and Doha, where she recorded wins over Caroline Garcia and Flavia Pennetta, but lost for the second time in a year to Muguruza and Venus Williams, respectively. She then progressed to Indian Wells where she lost in the third round to Heather Watson. After that, she competed in the 2015 Miami Open, where she lost to Carla Suárez Navarro in the fourth round.
In April, Radwańska participated for the second time in her career at Katowice Open in Poland, where she defeated Yanina Wickmayer, An-Sophie Mestach, Klára Koukalová before losing to Camila Giorgi in the semifinals.
Shortly after Radwańska's first-round loss at Stuttgart Open, Martina Navratilova stated that she was too busy to continue in her part-time role as Agnieszka Radwańska's consulting coach. Radwańska stated, "I just wanted to thank Martina for her time and efforts over these last few months. It was a great experience to work with one of the all-time greats. However, we both agreed that as Martina could not commit 100% to the project then it was not going to work as a long-term partnership."
At the Mutua Madrid Open, Radwańska defeated Lara Arruabarrena and Casey Dellacqua before losing to Caroline Wozniacki in the third round. As a result of this loss, Radwańska dropped outside of the Top 10 for the first time since October 2011. At the French Open, Radwańska was defeated by Annika Beck in the first round. The loss marked only her third first-round loss at a Grand Slam in her career, and her first since the 2009 Australian Open. In June, Radwańska competed in her first grass tournament at Aegon Trophy in Nottingham. She advanced to the semifinals at the Aegon Open Nottingham, losing to Monica Niculescu. In her next grass tournament at Aegon International in Eastbourne, Radwańska defeated Irina Falconi, Karolína Plíšková, and Tsvetana Pironkova to reach the semifinals of a grass event for the second time in three weeks, after doing so at Nottingham. After defeating Sloane Stephens, Radwańska reached her first final of the season against Belinda Bencic, who defeated her in three sets to claim her first WTA title.
Radwańska then started her Wimbledon campaign just three days after her final at Eastbourne. During the first week she defeated Lucie Hradecká, Ajla Tomljanović and Casey Dellacqua, all in straight sets. She then defeated Jelena Janković and Madison Keys to advance to the semifinals where she faced Garbiñe Muguruza. In her third Wimbledon semi-final in four years, Radwańska ended up losing the match in three sets. After her successful run at Wimbledon, Radwańska returned to the Top 10 after she dropped outside in early May this year.
Radwańska began her summer hard court season at the Bank of the West Classic, where she lost a tight three-set match to Angelique Kerber in the quarterfinals. As the defending champion at the Rogers Cup, Radwańska defeated Julia Görges and Alizé Cornet before losing to Simona Halep in the quarterfinal. Due to her first round loss at the Western & Southern Open, Radwańska decided to participate at the Connecticut Open, where she defeated CoCo Vandeweghe and Alizé Cornet but lost to Petra Kvitová in the quarterfinals. At US Open, she defeated Katerina Siniakova and Magda Linette before losing to Madison Keys in the third round.
At the Toray Pan Pacific Open in Tokyo Radwańska defeated Coco Vandeweghe, Elina Svitolina, Karolína Plíšková, Dominika Cibulkova and Belinda Bencic to win her first title of the season. Radw
Agnieszka Radwańska