Question: Which title did both Maria Sharapova and Fabio Fognini hold?

Context paragraphs:
2014 MercedesCup – Singles: Fabio Fognini was the defending champion, but lost in the semifinals to Roberto Bautista Agut. <br>

Simone Bolelli: Simone Bolelli (born 8 October 1985; ] ) is an Italian professional tennis player.  Bolelli is a Grand Slam champion since he won the 2015 Australian Open doubles event with Fabio Fognini, becoming the first all Italian men's pair to win a Grand Slam title in the Open Era.

2014 Copa Claro – Singles: David Ferrer was the two-time defending champion and successfully defended his title by beating Fabio Fognini in the final 6–4, 6–3.

2014 Maria Sharapova tennis season: The 2014 Maria Sharapova tennis season officially began on 30 December 2013 with the start of the 2014 WTA Tour.  Sharapova began the season, having only played one match since the previous June due to a shoulder injury, at the Brisbane International.  After failing to defend her points during the winter and spring hard court season, Sharapova almost dropped out of the Top 10.  She rebounded by dominating the clay court season which saw her win Stuttgart, Madrid and the French Open.  Her only loss on clay came to a resurgent Ana Ivanovic.  She then won her first hard court title since the 2013 BNP Paribas Open at the China Open.  Her season ended on 24 October 2014 following her elimination from the round robin stage at the 2014 WTA Finals in Singapore.  She ended the year raned No. 2 behind Serena Williams.

Maria Sharapova: Maria Yuryevna Sharapova (Russian: Мари́я Ю́рьевна Шара́пова ; ] ; born April 19, 1987) is a Russian professional tennis player.  A United States resident since 1994, Sharapova has competed on the WTA tour since 2001.  She has been ranked world No. 1 in singles by the WTA on five separate occasions, for a total of 21 weeks.  She is one of ten women, and the only Russian, to hold the career Grand Slam.  She is also an Olympic medalist, having earned silver for Russia in women's singles at the 2012 Summer Olympics in London.

2009 Sporting Challenger – Singles: Fabio Fognini was the defender of title; however, he chose to not participate this year.

Fabio Fognini: Fabio Fognini (] ; born 24 May 1987) is an Italian professional tennis player who is currently ranked world No. 29 in men's singles by the Association of Tennis Professionals (ATP) and the current Italian No. 1.  His career-high singles ranking is world No. 13, achieved in March 2014, and world No. 7 in doubles, achieved in July 2015.  Fognini's most successful surface is red clay, upon which he won his four ATP singles titles in Stuttgart, Hamburg, Viña del Mar and Umag, reached the quarterfinals of the 2011 French Open and the semifinals of the 2013 Monte-Carlo Masters.  Together with Simone Bolelli, Fognini won the 2015 Australian Open doubles event, becoming the first all Italian men's pair to win a Grand Slam title in the Open era.

2015 Monte-Carlo Rolex Masters – Doubles: Bob and Mike Bryan successfully defended their title by defeating Simone Bolelli and Fabio Fognini in the final, 7–6, 6–1.

2013 International German Open: The 2013 International German Open (also known as the bet–at–home Open – German Tennis Championships 2013 for sponsorship reasons) was a men's tennis tournament played on outdoor red clay courts.  It was the 107th edition of the event known that year as the International German Open and was part of the ATP World Tour 500 series of the 2013 ATP World Tour.  It took place at the Am Rothenbaum in Hamburg, Germany, from 14 July through 22 July 2013.  Twelfth-seeded Fabio Fognini won the singles title.

2009 AON Open Challenger – Singles: Fabio Fognini chose to not defend his 2009 title.

Supporting paragraphs: Fabio Fognini Maria Sharapova
Answer: Grand Slam