The Portugal international netted a hat-trick in his side's 7-3 win over Sevilla in midweek before adding two more goals to his tally in the 3-2 victory against Rayo Vallecano at the weekend and now trails leader Nerijus Valskis - who did not play this week - by just one point.
Meanwhile, Atletico Madrid striker Diego Costa continued his rise to the top with a productive week of his own. The Brazil-born attacker found the net once against both Granada and Athletic Bilbao and is level on points with Ronaldo.
Other big names who are on the verge of breaking into the top 10 are Robert Lewandowski, Giuseppe Rossi and Edinson Cavani, who are all on 18 points at the moment - along with 10th-placed Konstantinos Mitroglou - but the aforementioned trio have played more games than the Olympiakos man.
