[21] When the transfer window reopened in January 2018, Dutch centre-back Virgil van Dijk joined Liverpool for £75 million, a world record fee for a defender.
[27] A week later, the club drew 2–2 with Championship side Brentford, with both goals scored by striker Charlie Austin shortly after the half-time break.
[28] On 29 July the Saints beat French side Saint-Étienne 3–0, with two goals in two minutes scored by Manolo Gabbiadini and James Ward-Prowse, followed by a late header from Maya Yoshida.
[30] Three days later the club won their final pre-season friendly of the summer against Spanish side Sevilla, with goals coming from Jack Stephens in the first half and Manolo Gabbiadini in the second.
[33] Tadić doubled the hosts' lead with a penalty given away by former Saints defender José Fonte five minutes after the red card, before Javier Hernández brought one back for the Hammers on the stroke of half-time.
[33] Hernández equalised for West Ham in the second half, but a second penalty for the home side was scored by substitute Charlie Austin in the final minute of the game.
[35] Abdoulaye Doucouré opened the scoring for the visitors shortly before half-time with a 25-yard volley, before substitute Daryl Janmaat doubled his side's lead in the 66th minute with a 30-yard shot.
[38] The hosts opened the scoring before half-time through a Mame Biram Diouf header, with Forster saving a Saido Berahino penalty a few minutes later.
[39] Isaac Hayden opened the scoring in the 20th minute with a long-range shot following an earlier effort that was saved, and Joselu almost made it two before half-time when he hit the crossbar.
[39] Shortly after the break, Manolo Gabbiadini equalised for the hosts from close range, but within a minute and a half the visitors had regained the lead through Ayoze Pérez.
[40] The Saints enjoyed a number of chances to open the scoring, with Ryan Bertrand hitting the crossbar from a free kick and Shane Long missing from close range in the first half.
[42] The hosts came close to scoring in the first half and early in the second through Sofiane Boufal, Nathan Redmond and Maya Yoshida, all of whom were denied by saves by goalkeeper Nick Pope.
[45] Maya Yoshida missed a close range volley in the visitors' best first-half chance, before Kevin De Bruyne opened the scoring for the hosts shortly after half time.
[46] Both teams had a number of chances on goal, but it was the hosts who opened the scoring through winger Ryan Fraser just before half-time, following a defensive error by Wesley Hoedt.
[47] The visitors dominated possession, but struggled to pressure Southampton's goal until two minutes from the end of the game, when Olivier Giroud headed in an equaliser for the Gunners.
[52] Harry Kane scored two in the first half from close range, with his first breaking the record for most Premier League goals in a calendar year, previously held by Alan Shearer.
[55] Andre Gray brought a goal back for the hosts in the second half, before Watford secured a point in controversial circumstances when Abdoulaye Doucouré scored in the final minute of normal time after using his hand.
[57] Glenn Murray opened the scoring with a 14th-minute penalty, after a foul by Wesley Hoedt, with Jack Stephens equalising in the second half from a James Ward-Prowse corner.
[58] The Baggies opened the scoring within five minutes when Ahmed Hegazi headed in a corner from Chris Brunt, but the Saints increased the pressure and dominated much of the rest of the first half.
[61] The hosts had a number of chances in the second half through Josh Sims, Cédric Soares and substitute Sofiane Boufal, but were unable to convert and were held at 0–0.
[62] It would spell the end of Mauricio Pellegrino's tenure as Southampton manager, as he was sacked on 12 March with the club one point above the relegation zone and having won just once in 17 matches.
[63] Southampton offered little in terms of goalscoring opportunities, and before half-time Arnautović scored his second and West Ham's third to secure the win, which saw the visitors drop back into the relegation zone.
[65] After continuing to enjoy the majority of chances on goal, the Saints doubled their lead shortly after half-time when Premier League debutant Jan Bednarek scored from James Ward-Prowse's free-kick.
[67] The visitors started the second half with the stronger approach, but it was the hosts who scored next ten minutes after the break as Tadić doubled his tally to put his side ahead.
[67] Charlie Austin and Shane Long came close to scoring a third, before Bournemouth increased the pressure towards the end and almost equalised through Ryan Fraser in stoppage time, but for a save by Alex McCarthy.
[68] The hosts equalised in the last minute of added time at the end of the match, shortly after goalkeeper Alex McCarthy denied Leighton Baines, when a shot from Tom Davies deflected off Wesley Hoedt.
[70] The hosts arguably enjoyed more chances on goal than the champions, with centre-backs Jack Stephens and Wesley Hoedt both almost scoring early in the first half – the former after a long run through the middle of the pitch, and the latter with a header which hit the crossbar.
[70] After the half-time break, City increased the pressure as Raheem Sterling beat Alex McCarthy with a shot that hit the post, and John Stones came close with a header that the Saints goalkeeper tipped over the crossbar.
[4] However, Olivier Giroud opened the scoring less than a minute after the restart, beating several defenders and goalkeeper Alex McCarthy after being put through in the box by Eden Hazard.
[4] Chelsea doubled their lead late on after bringing on Alvaro Morata, who headed in a cross from César Azpilicueta to secure a place in the final and send Southampton out of the tournament.