Mateo Kovacic claims he does not have any concerns about Kai Havertz's form despite the German suffering a slow start to his Chelsea career.
The 21-year-old is struggling to nail down a regular spot in Frank Lampard's starting eleven this season following his £89million move from Germany and has just one goal in 13 top-flight matches.
The form differs to Havertz's last season at Bayer Leverkusen where he scored 18 times and registered six assists but Croatian midfielder Kovacic is confident the attacker can soon rediscover the form that earned him a Premier League move.