The Paraguay international played for the last seven minutes of last week's win at Reading after a six-month lay-off with a groin injury.
Fellow defender Emmerson Boyce also came through his comeback from hamstring trouble unscathed and winger Ryo Miyaichi (ankle) is close to returning after three months out.
Arsene Wenger delivers his tactical analysis More »
Arsene Wenger - 7 hours agoJames Horncastle looks at the theory and More »
Pitchside Europe - 8 hours agoPaul Parker believes Jose Mourinho should resist More »
Paul Parker - 10 hours agoAhead of the Champions League final between More »
Pitchside Europe - 16 hours agoMuch is made of Borussia Dortmund's attacking More »
Pitchside Europe - 17 hours ago