Having secured their first pieces of silverware in senior football last weekend, the duo capped a fine period in Green and White, helping the Scottish champions to an impressive half-time lead.
Both were memorable strikes too - Guidetti’s a powerful effort from outside the box and Denayer’s a nifty backheel.
See for yourself:
Denayer has made a superb impact at the club, prompting teammate Efe Ambrose to speak out, urging Celtic boss Ronny Deila to do everything in his power to keep the Belgian.
Also on the scoresheet this weekend was Seko Fofana. The midfielder netted for Fulham in their incident-packed 2-0 win at Huddersfield.
At 1-0 up, the visitors survived two penalty misses to maintain their lead before Fofana sealed the three points in injury time with his first senior goal, finding the net on the rebound after his initial effort had hit the post.
Elsewhere, Jordy Hiwula took to the pitch at Wembley for Walsall as a 62nd-minute substitute but couldn’t prevent his side from falling to a 2-0 defeat to Bristol City in the Johnstone’s Paint Trophy.
Speaking after the game, the youngster insisted his side must move on from the disappointment, declaring: “We will come back from this - that is what you have to do in football.
“You cannot dwell on defeats, you have to be ready to go again.”
In other news, there were bad days for Shay Facey of NYCFC and Marcos Lopes of Lille as both players were sent off. Facey received a second yellow to become the first NYCFC player to be given an early bath, while Lopes was shown a straight red.
Both players took to Twitter after their games to express their apologies:
Hard one to take, but thanks for the support... I will learn from this and come back stronger and wiser. Thanks #NYCFCFamily
— Shay Facey (@ShayFacey) March 21, 2015
It was never my intention to let down my team. It was a big lesson and I'm very disappointed. Sorry to my colleagues and @losclive fans...*
— Rony Lopes (@Rony10Lopes) March 22, 2015
Back in England and Scott Sinclair completed 90 minutes for Aston Villa against Swansea - only to see his former club claim victory at Villa Park.
In League One, Devante Cole lasted 58 minutes of promotion-chasing MK Dons’ 4-1 win over Notts County, and Greg Leigh came off with two minutes remaining of struggling Crewe’s 1-0 home defeat to Oldham.
George Evans also completed 70 minutes of Scunthorpe’s 3-1 loss at Rochdale.
In Europe, Alvaro Negredo helped Valencia to a 4-0 win at Elche, coming off the bench on 67 minutes. Also in La Liga, Bruno Zuculini lasted 50 minutes of Cordoba’s defeat at Real Sociedad in an ill-tempered game that saw three men sent off for the visitors!
Chidiebere Nwakali did not feature for Malaga.
Over in Germany, Matija Nastasic played the full game for Schalke in their home loss to Bayer Leverkusen.
There was a more positive result in Holland, where Divine Naah completed 90 minutes for NEC Breda in a thrilling 4-3 win at Utrecht. Karim Rekik however was on the losing side as PSV fell to a 2-1 defeat at Feyenoord.
In Italy, Micah Richards was an unused substitute in Fiorentina’s 2-2 draw with Udinese but there was better news for the defender in midweek, as he became the last Englishman standing in European competition this season, following his side’s progression in the Europa League.
Finally, Sinan Bytyqi continues his absence from the Cambuur side with a cruciate ligament injury, while Godsway Donyoh and Bismark Boateng are awaiting the start of their seasons in April in Sweden and Norway respectively.