Dr Sakari Orava said he begged for the Lord's help in healing Becks' Achilles tendon, which he ripped playing for AC Milan.
"It wasn't so easy to get back to sleep. But I'm a devout Christian, so my wife and I prayed. We said it is not up to us, it's in bigger hands to see if things go fine," The Sun quoted Orava, as saying.
Milan bosses made a frantic phone call to the world renowned Achilles expert on Monday.
Becks, 34, tore his tendon last Sunday.
He was operated at the orthopaedic surgeon's clinic in the Finnish city of Turku the next day.
Beckham has been ruled out playing in the World Cup.
"There is mental stress and pressure, but you can't show it. The job needs to be done. My hands were not trembling," he said.
