oxlade-chamberlain is struggling to recover from a groin problem and has been ruled out of the fa cup semi-final against reading at wembley .
arsenal boss arsene wenger hopes he could be back in full training by the end of next week but is not certain and admits the england midfielder may not play again this season .
arsenal captain mikel arteta , out since november with calf and ankle injuries , will also miss out at wembley but is expected to return to full training with the first-team squad on monday or tuesday after his latest set-back that