Diego Costa will not return to Chelsea team unless his attitude improves

• Antonio Conte will not hold talks with Costa but judge him on training pitch
• Chelsea likely to sell striker in summer but will reject China bid this monthAntonio Conte has no plans to hold clear-the-air talks with Diego Costa and the onus will be on the Spain forward in training this week to prove he warrants a swift restoration to the Chelsea side for Sunday’s visit of Hull.Costa, the subject of interest from the Chinese Super League club Tianjin Quanjian, who would apparent