Diego Costa will wear a protective mask against Newcastle after his nose was broken in training by Chelsea academy kid Fikayo Tomori.The Chelsea striker, who is having something of a renaissance under interim coach Guus Hiddink, broke it in an accidental collision with the young Canadian defender on Thursday.Costa, who has scored seven times in his last nine matches, will start up front against Newcastle after training in the mask on Friday afternoon. What manner of footballer is Diego Costa? Is he more of a blessing or just a problem Child you want to just wish away?