Bamford signed on loan at the Riverside in the opening stages of the season, opting to stay originally until January.
The England Under-21 star has found a rich vein of form in recent weeks, scoring in his last two matches to take his seasonal tally to three. He has also netted in the League Cup, and has become a key part in Boro’s quick ascension to second place in the Championship table. Having proven himself in the second division last season - with eight goals in 21 games for play-off finalists Derby County - Bamford was set to join up with the Blues first-team over the summer, but, with the arrivals of Diego Costa and Loic Remy, the youngster was once again farmed out on loan - and Boro have been benefiting.
However, with January fast approaching, head coach Karanka is set to lose the former Nottingham Forest man - with his deal set to expire - but the Spaniard is keen on tying the Englishman down until the end of the season.
Speaking to Gazette Live, the former Real Madrid man said: “I’m very pleased with him [Bamford].
“He arrived here in the first international break, and it’s difficult when you arrive at one place without a pre-season - with a new place to live, a new club, new teammates and a new manager.
“But he’s working really well, and he is scoring.”
Karanka - who worked at Madrid under current Blues boss Jose Mourinho - admitted that discussions had not been started regarding the player staying past January, but he could not see any objections from either the player or the club.
He added: “I don’t think we need to speak a lot, because he is happy here, the club and me are happy with him here, and he is involved with the team very well.
“So I can’t understand that we are going to have problems to extend the loan.”
And when pressed if he would like to see Bamford stay all season, the Spaniard replied: “Of course!"