The 29-year-old midfielder has already found the net seven times this season and is Zaragoza's second highest goal scorer after Helder Postiga. Embattled boss Manolo Jimenez will hope Apono's return from injury sparks a revival in fortunes and delivers his first Liga win of the calendar year.
The Portugal captain failed to score for his country in the crucial World Cup qualifier against Israel and was forced sit out the following match against Azerbaijan through suspension. Ronaldo will hope to pick up where he left off for Real Madrid ahead of the Champions League quarter-final clash with Galatasaray.
Zaragoza are in horrendous form and will hope the visitors will be jaded following a gruelling international break. In contrast, Madrid are in excellent shape and will want to continue their winning run heading into the midweek encounter with Galatasaray.