Dani Ceballos scored a stoppage-time winner as Arsenal reached the FA Cup semi-finals with a dramatic 2-1 win over Sheffield United. 

Nicolas Pepe's first-half penalty appeared set to be the only goal at Bramall Lane, only for a largely forgettable game to explode into life in the closing stages. 

Sead Kolasinac's poor clearance struck team-mate Shkodran Mustafi to inadvertently tee up David McGoldrick for an 87th-minute equaliser, seemingly sending the all-Premier League tie into extra time. 

However, substitute Ceballos beat Dean Henderson with a low shot from a tight angle to secure a July trip to Wembley for Mikel Arteta's side.