Celtic have entered the race to sign Noble Mendy this week. Sources confirm they are one of multiple teams pursuing the Spanish full-back. Additional suitors from the Bundesliga also join the chase. Mendy almost joined Rangers last season but failed a medical. That move collapsed before Celtic made an attempt to sign him one year later. The player remains with his current club, holding a market value estimated at £6.4 million. No medical has occurred for this new deal yet. Both teams must settle a fee before any transfer can proceed. Talks progress slowly as European deals intensifies.