"When you have Diego in the team it is very hard to get a chance because he is playing so well and scoring goals, but I'm sure Michy is ready to take his opportunity because he is working hard every day," Matic told the London Evening Standard.
Batshuayi has scored three times in 13 appearances for Chelsea, and Matic said the 23-year-old Belgian was an excellent understudy to Costa.
"Of course he has benefited from working with Costa," Matic added. "It was the same with me seven years ago (in Matic's first spell at Chelsea). It was very good for me to see how Frank Lampard played, how Michael Ballack played and Michael Essien.
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"So it is good for Michy and a good experience for him to see Diego's movement. He will have learned from watching and playing with Diego."
Midfielder N'Golo Kante is also suspended, and Cesc Fabregas is expected to partner Matic in midfield for the league leaders when 10th-placed Bournemouth visit Stamford Bridge.
(Reporting by Hardik Vyas in Bengaluru; Editing by Peter Rutherford)
