The New Zealand born lineout specialist damaged knee ligaments in the controversial last-gasp defeat to Leinster on Saturday and could miss the important European clash.
However, Blues Director of Rugby David Young explained that the injury should not keep the former New Zealand Maoris skipper out for long. "Paul is very, very doubtful," said Young. "It isn't a long-term problem, but he has strained his medial ligament in his knee. It's very unlikely he will be fit for the Gloucester game, but he should be fit for the visit of Calvisano."
Tito's compatriot Ben Blair is also doubtful after it was confirmed that the fullback has broken his hand. "We are looking at Ben and will make a decision on Wednesday," added Young. "He can pass the ball but we won't risk him if he isn't fit."
On a more positive note, it looks as though Martyn Williams will be available after missing the Magners League game at Leinster. The Blues go to Kingsholm looking to secure an all-important home draw for the Quarter Finals of the Heineken Cup.
The team to play Gloucester will be announced on Friday.