Rangers have been fired a warning of Benfica’s attacking capabilities as the Portuguese club dismantle Portimonense 4-0. The Liga Portugal leaders have been beaten once in the country’s top flight this season and continued their fine form with a second half masterclass in Lisbon. Stalwart attacker Rafa Silva netted a double in the game, either side of goals from South American pair David Neres and Angel di Maria. The Brazilian and Argentine winger options exemplify the firepower in the Benfica squad but Rangers will fancy their own chances in the Europa League Round of 16. Rangers and Benfica …