West Ham’s seven-minute answer turns Portsmouth possession into a footnote

West Ham did not need the ball for long; they needed seven minutes with the right people near it. Portsmouth had more possession, more corners and the same number of shots at the London Stadium, yet left the League Cup first-round tie beaten 3-1 after Valentín Castellanos and Jarrod Bowen converted a difficult first half into a firm home result.

The useful distinction is not that West Ham survived an awkward evening before finding a scoreline. It is that their decisive work came when Portsmouth’s control had not produced enough separation. Adrian Segečić’s deflected opener gave the visitors a lead after 33 minutes, and Rocco Shein soon tested Mads Hermansen from distance. West Ham then scored at 43, 45 and 50 minutes. A match with plenty of Portsmouth involvement became one in which West Ham had supplied the punishment.

Possession belonged to Portsmouth; the penalty box did not

Portsmouth finished with 55% possession to West Ham’s 45%, making 412 total passes to the hosts’ 341. They also took seven corners to West Ham’s three, played 22 crosses to eight and registered 85 successful final-third passes against 45. Those are not the figures of visitors who spent the evening waiting for permission to play.

Yet the more revealing numbers sit nearer goal. West Ham had 21 touches in the opposition box to Portsmouth’s 15, and put seven of 12 shots on target. Portsmouth also had 12 attempts, but only four tested Hermansen. West Ham’s edge in the most demanding areas of the pitch decided the tie.

That does not erase Portsmouth’s first-half performance. Segečić collected a half-cleared cross outside the box and saw his shot deflect off Max Kilman into the net. The visitors then had the larger share of possession before the interval, with Shein impressing in midfield. Their problem was not a lack of territory; it was the failure to turn their best spell into a second goal.

A response measured in minutes

West Ham’s equaliser arrived immediately after Shein’s effort was dealt with by Hermansen. Mohamadou Kanté supplied a low cross and Castellanos finished it at 43 minutes. Two minutes later Bowen struck from outside the box; the shot deflected off Conor Shaughnessy’s head, wrong-footing Nicolas Schmid.

The sequence changed the obligation of the tie. Once Bowen made it 2-1, Portsmouth had to chase a game that had moved away from their preferred rhythm. West Ham had gone from one goal down to one goal ahead in two minutes.

There was no extended reset after half-time. Bowen broke into space on the right and lifted a cross for Castellanos, whose header found the bottom-left corner in the 50th minute. Castellanos finished with two goals; Bowen finished with a goal and an assist. The pair accounted directly for all three West Ham goals, while Kanté and Pablo supplied the other assists.

Directness found the weak point

West Ham’s 15 aerial duels won, compared with Portsmouth’s seven, fits the final goal neatly. It should not be stretched into a complete tactical verdict, yet the Bowen-Castellanos combination offered a practical route around Portsmouth’s possession advantage: get Bowen space on the right, then put a delivery into an area Castellanos can attack.

The hosts were also more accurate in their passing, recording 82.1% to Portsmouth’s 80.3%. West Ham did not dominate the match through volume. They made their sharper passages count, then dealt with the rest. Their 35 clearances, versus Portsmouth’s 14, point to the amount of defending required after taking control of the score.

Portsmouth offered little threat after West Ham’s third, though Segečić still had a stoppage-time effort saved by Hermansen. At the other end, Pablo hit the post in the 90th minute. The score remained 3-1, leaving West Ham in the next round and Portsmouth with an evening that contains more encouragement than the result allows.

What the result actually says

A cup tie can make possession look like authority when it is merely a description of where the ball has been. Portsmouth had 55% of it and equal shot volume, but West Ham created the clearer concentration of danger: more box touches, more shots on target and three goals in seven minutes.

Nuno Espírito Santo’s side did not produce a polished 90-minute command. They produced something more useful in a knockout match: an answer before half-time and a third goal before Portsmouth could settle into the second half. For Castellanos and Bowen, the evidence is even plainer. When the game opened, both were already where West Ham needed them.

Research: This article uses the archived evidence supplied for this story. Story inspiration: BBC Sport's original report.