Paul Pierce discusses his thoughts on Mickael Pietrus' serious injury that forced him to leave Friday night's game in Philadelphia. Pierce also discusses what the loss means for the Celtics.<br /><br />-~-~~-~~~-~~-~-<br />Please watch: "FULL KYRIE IRVING and GORDON HAYWARD CELTICS Press Conference" <br />https://www.youtube.com/watch?v=f7FoDj4-Nzw<br />-~-~~-~~~-~~-~-