Chelsea manager, Jose Mourinho, has confirmed that Nigeria international John Obi Mikel will spend one month on the sidelines after undergoing knee surgery. <br /><br />Thus, the central midfielder will be absent when the Super Eagles take on Bolivia in Uyo in an international friendly on the 26th of March.<br /><br />&ldquo;Mikel had a little surgery on his meniscus,&rdquo; Jose Mourinho told reporters at a press conference.<br /><br />&ldquo;We are expecting him to be out for about a month - one week is already gone. There is not too much optimism or pessimism.<br /><br />&ldquo;I would say (he will be back) first week of April.&rdquo;<br /><br />The 27 - year - old will be unavailable for selection in Premier League games against West Ham, Southampton and Hull City plus the Champions League clash at home to Paris Saint Germain.&nbsp; <br /><br />Photo Credit : Twitter<br />