Roberto Di Matteo could become Chelsea boss on a permanent basis after impressing owner Roman Abramovich during his time as caretaker, according to The Mail Online.The Italian has overseen seven matches since taking the reins from Andre Villas-Boas, who was sacked earlier this month.Of those games he has won five and only suffered a single defeat, which came against high-fliers Manchester City at Etihad Stadium.It is understood that other candidates for the job have been put forward but the record of Di Matteo, which includes reversing a first-leg deficit against Napoli in the Champions League to progress to the quarter-finals, may prove enough.Despite Chelsea officials being privately impressed with his managerial stint, Di Matteo has refused to comment publically on the prospect of becoming the next permanent boss.