Goals from Naby Keita and Roberto Firmino earned Liverpool a 2-0 win over Porto on Tuesday to give Juergen Klopp's side the upper hand in their Champions League quarter-final tie. Liverpool took a fifth-minute lead through a Keita shot which deflected off Porto midfielder Oliver Torres and beat the helpless Iker Casillas. Firmino doubled the advantage in the 26th minute -- Jordan Henderson split the Porto defence with a superb pass to Trent Alexander-Arnold, whose low cross was tapped in from close range by the Brazilian. Moussa Marega then had a low drive well saved by the legs of Liverpool keeper Alisson Becker and the Portuguese side did well to stay in the game in a scrappy second half to give themselves a chance of a comeback at home in next week's second leg. (For more sports news and updates, follow Ahram Online Sports on Twitter at @AO_Sports and on Facebook at AhramOnlineSports.)