Tedic scored the goals either side of the interval with Adam Phillips providing the assist on both occasions.
The Reds have now won nine-successive home matches while Oxford are only outside the relegation zone on goal difference and are without a win in 17 games.
Duff said: “He’s been excellent, we’ve watched him grow during the season.
“He’s definitely a different animal now compared to when he first came here.
“He came back from injury physically miles better. Manchester City don’t pay three million euros for someone they don’t think is very good.”
The visitors forced Harry Isted into action in the 28th minute when Cameron Brannagan struck a free kick from the edge of the box, but the Barnsley stopper tipped it round a post.
This story is from the {{IssueName}} edition of {{MagazineName}}.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Sign In
This story is from the {{IssueName}} edition of {{MagazineName}}.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Sign In
I'd still want to keep Pat on side
Patrick Bamford has always been a player who divides opinion amongst Leeds supporters.
WHITES & THE BLADES SPEED ON
LEEDS and Sheffield United maintained their pace at the top of the table with comfortable home victories - but Sunderland slipped off the summit.
BAILEY: WE'LL GIVE POPPIES THE RESPECT THEY DESERVE
OWEN Bailey knows exactly how pumped up seventh-tier Kettering Town will be when Doncaster Rovers roll into ramshackle Latimer Park today.
TOWN EARN THEIR CORN!
HARROGATE mon Weaver breathed a sigh of relief after his side edged past Gainsborough Trinity at a rain-sodden Exercise Stadium.
OH MY JOSH - O'S KEEPER IS THE HERO!
RICHIE Wellens praised keeper Josh Keeley as Leyton Orient reached the third round following a dramatic win over National League Oldham.
'IT HASN'T BEEN MY WHOLE FOCUS AND THAT HELPED ME
SHAUN Barker never attempted to conceal the fact that he had no burning desire to play football.
MATT'S BOYS SHOW CLASS
WYCOMBE side-stepped a tricky second round fixture by defeating Wealdstone at Grosvenor Vale.
LUKE SEETHES OVER SLOPPY SWANS START
LUKE Williams admitted he gave his players the hairdryer treatment at half-time after seeing them come into the break trailing against bottom of the table Portsmouth.
UPSET FOR HARRIS AS TYLER HITS STUNNER
Neil Harris insisted the fact that Millwall were bitterly disappointed to claim only a point shows the progress his side have made over the past 10 months.
ANTE AT THE DOUBLE FOR ON-SONG CITY
NORWICH head coach Johannes Hoff Thorup paid tribute to the home fans after watching his side come through a tough test against Luton to win comfortably in the end.
