Nigerian defender Tolaji Bola faces a spell on the sidelines after picking up an injury in Arsenal&rsquo;s 1-1 draw with FC Basel in the UEFA Youth League on Tuesday.<br /><br />To add insult to injury, the Gunners U19 squad did not qualify for the knockout rounds of the Youth League after finishing behind PSG and Basel in Group A.<br /><br />Bola had to be substituted around the half-hour mark due to his injury and the length of absence will be determined once he undergoes further tests in the coming days.<br /><br />The central defender has suited up nine times for Arsenal U18s in the U18 Premier League this term, and made three appearances for the U21s in Premier League 2.<br /><br />Aged 17, he is a very important member of England&rsquo;s U18 squad.<br /><br />Ifeanyi Emmanuel <br /><br />Photo Credit : arsenal.com<br />