Against a backdrop of sleet, flurries, and a biting wind off the waters of the Humber Estuary, alongside a resolute home side pushing hard for a top-flight place, this presented all the ingredients of a difficult night's work for Chelsea.
"We could have added to our tally but the opposition are a strong team and it was a tough fixture; I am very pleased with the display," the manager stated. "Hull City is very special to me so it was great to get a good reception from the fans of supporters. The application of the lads was superb."
The Chelsea manager has this place close to his heart, given some of his relatives hail from Hull and his enjoyable spell in charge of the Tigers. This happy connection continued with a magnificent performance from his squad, who in the end sauntered into the next round of the famous old competition.
Three days removed from letting slip a two-goal advantage in the Premier League, there was a hint of vulnerability about Chelsea going into this intriguing cup clash. The packed Hull support clearly sensed it too, but the London side navigated the task with ease.
Rosenior made alterations, enacting multiple of them to his XI. The tie could and perhaps ought to have been decided long before it eventually was, with both Estêvão Willian and Liam Delap guilty of spurning excellent opportunities to put Chelsea ahead in the opening period.
But, fortunately for the visitors, Pedro Neto was in a much more ruthless mood. He broke the scoring with a marvellous distance effort, which proved to be the catalyst for Chelsea to take command of proceedings. By full time, they had 4 goals, with the forward netting three of them for a brilliant hat-trick.
The home side displayed great fight throughout, but the clearer opportunities always came to the visitors. Estêvão ought to have broken the scoring when he rounded keeper the Hull stopper before unbelievably firing over. The striker then had a comparable horror incident in front of goal against his former club.
He deflected a Phillips's clearance which bounced back from the bar, and he started to celebrate thinking the ball had crossed the line. It hadn’t, and by the time he understood, Hull's backline had responded to clear the threat.
Delap had his head in his hands after that moment, but he was hugely instrumental from there on out, registering 3 assists. The first was for the first goal as his pass set up Neto to finish from range. Six minutes after the second half began, it was two as the forward's set-piece went directly in under the keeper's legs.
Seven minutes after Neto’s second goal, the match was put beyond doubt as a dazzling dribble from Delap laid on his teammate to slide into an empty net. Neto then finished his hat-trick as Delap once again delivered the decisive pass for the striker to calmly convert by a helpless goalkeeper.
At that point, the effort Hull had done in the first thirty minutes had been erased. Their priority must now return to achieving a promotion to the top division under their manager, who rested several first-choice individuals with that aim in mind.
"I think we earned at least one goal but if we play like this we will be in a very good situation in the Championship," he said. "Never surrender, maybe in the next matches this can be a positive lesson of how we must play."
Hull showed great endeavour to the end, and they almost got a late goal when a substitute hit a the upright in injury time. But this was the Blues' night, and another positive step forward for their new manager at a place he knows intimately.
That resulted in an ultimately straightforward night's work, and the FA Cup-shaped omens are good from here for the winners. They have faced Hull on three other occasions in this competition in the last decade and on each occasion, they have progressed to make the final. There is still work in that respect, but this was another significant tick for Rosenior.
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