Former Hull midfielder Jake Livermore says he feared the worst when Ryan Mason fractured his skull.
The England midfielder, 25, clashed heads with Chelsea defender Gary Cahill during Hull's defeat at Stamford Bridge but is making 'excellent progress'.
Livermore - who joined West Brom on Friday and has been in touch with Mason - said: "It's never nice to see any fellow professional seriously injured.
"Hopefully his speedy recovery continues."
Livermore played with Mason at both Tottenham and Hull, with Mason becoming the Tigers' record signing when he left White Hart Lane last summer.