The Serbian uses placenta to help players recover quickly from muscle injuries and on Saturday Costa wants to play for Atletico Madrid against Real Madrid in the Champions League final.
Costa has been diagnosed with a grade one hamstring tear, sustained against Barcelona last weekend in La Liga.
That sort of injury usually keeps players out of action for around 15 days, which would rule him out of the showpiece event in Lisbon if the treatment does not work.
Costa will rejoin the Atletico Madrid squad on Wednesday after flying back from Serbia.
Kovacevic has treated several Premier League stars before, including then-Arsenal striker Robin van Persie and Chelsea’s Frank Lampard.
Yossi Benayoun, while at Liverpool, was privy to her treatment and gave the doctor a glowing endorsement.
‘There were no animal parts used and no injections,’ he said.
‘The doctor has treated a lot of players and seems to be held in very high regard.
‘She explained everything to me beforehand and told me she would be using fluid from a placenta that had come from a woman.
‘Nothing went into the muscle itself. It was just a case of massaging the liquid on to the skin around the affected area.
‘It meant I was able to play again within a fortnight and help the team at an important time.’
His manager at the time, Rafa Benitez said: ‘She is a doctor with a degree in pharmacology and is really good with muscle injuries.
– Daily Mail