Liverpool's Raheem Sterling, right, keeps the ball from Manchester City's Yaya Toure during their English Premier League soccer match at Anfield Stadium, Liverpool, England, Sunday April 13, 2014. (AP Photo/Jon Super)
Manchester City's Yaya Toure, center, leaves the field after sustaining an injury during their English Premier League soccer match against Liverpool at Anfield in Liverpool, England, Sunday April. 13, 2014. (AP Photo/Clint Hughes)
Manchester City's Yaya Toure, left, leaves the field after sustaining an injury during their English Premier League soccer match against Liverpool at Anfield in Liverpool, England, Sunday April. 13, 2014. (AP Photo/Clint Hughes)
Before their English Premier League soccer match at Anfield Stadium against Manchester City Liverpool supporters hold banners prior to a minute's silence in tribute to the 96 supporters who lost their lives in the Hillsborough disaster of 25 years ago on 15 April 1989, Liverpool, England, Sunday April 13, 2014. (AP Photo/Jon Super)
Liverpool's Philippe Coutinho, second right, celebrates after scoring the winning goal against Manchester City during their English Premier League soccer match at Anfield Stadium, Liverpool, England, Sunday April 13, 2014. (AP Photo/Jon Super)
Before their English Premier League soccer match at Anfield Stadium against Manchester City Liverpool supporters hold their scarves prior to a minute's silence in tribute to the 96 supporters who lost their lives in the Hillsborough disaster of 25 years ago on 15 April 1989, Liverpool, England, Sunday April 13, 2014. (AP Photo/Jon Super)
Manchester City's David Silva celebrates after scoring his second goal against Liverpool during their English Premier League soccer match at Anfield Stadium, Liverpool, England, Sunday April 13, 2014. (AP Photo/Jon Super)
Tributes are laid at the memorial of the Hillsborough disaster outside Anfield before the English Premier League soccer match between Liverpool and Manchester City at Anfield in Liverpool, England, Sunday, April 13, 2014. (AP Photo/Clint Hughes)