Manchester United are planning for a big off-season after star striker Romelu Lukaku claimed "a lot of good players" will move to Old Trafford in 2018-19.
United invested heavily this season, signing Lukaku, Nemanja Matic, and Victor Lindelof in July before Alexis Sanchez arrived from Arsenal in January but the Red Devils have taken a back seat to neighbours Manchester City this term.
Jose Mourinho's are second and 16 points adrift of City in the Premier League, while United sensationally crashed out of the Champions League in the round of 16 on Tuesday.
And United – who overcame Brighton and Hove Albion 2-0 in the FA Cup quarter-finals on Saturday – are set to be active in the transfer market again, according to Lukaku.
"We are Manchester United, we have to improve every year and I know that a lot of players, a lot of good players, will come in next season. That's for sure," said Lukaku, who scored against Brighton to take his season tally to 25 goals.
"That is something I look forward to, in order to improve the squad, and what the manager also looks forward to because next year we have to win.
"We will have to try and win as many trophies as we can."
Mourinho was scathing of United, despite their victory over Brighton at Old Trafford, accusing his players of being scared to play, while he was also critical of Luke Shaw's performance on Saturday.
The Portuguese's post-match comments came after his passionate 12-minute monologue during Friday's news conference, in which he defended his record as United manager following their 2-1 aggregate defeat to Sevilla.
Despite the scrutiny over United's exploits this term, Lukaku said: "I don't believe we are really that short in being able to compete in the big competitions.
"We knew immediately after the game against Seville that we weren't good enough, so we accept the criticism."
Lukaku also leapt to the defence of under-fire team-mate Sanchez, who was an unused substitute in the FA Cup clash.
Sanchez has only scored once in 10 appearances for United – against Huddersfield Town in February – since his high-profile transfer from Arsenal.
"As long as he keeps working hard like he does, I think he'll come good for us," the Belgium international added. "He is a quality player with a lot of assets.
"Look at my situation. I started really well and then had the dry spell in November and December. But at the end of the day with hard work you are always going to get through it."
|Shakhtar Donetsk 2 Hoffenheim 2: Maycon denies Nagelsmann´s side|
|Ajax 3 AEK Athens 0: Tagliafico at the double in opening win|
|Dalot makes debut, Martial starts for Manchester United|
|India avenge ICC Champions Trophy loss with big win over Pakistan|
|Ronaldo makes Champions League debut for Juve|
|Lopetegui picks Navas over Courtois for Champions League clash with Roma|
|Willian very happy under Sarri after Conte row|
|Sarri deals blow to Chelsea kids´ Europa League hopes|
|Mendy out for Manchester City as Aguero makes bench|
|Cech accepts performances key to securing Arsenal stay|
|Monchi rules out Spain return amid Barcelona rumours|
|Durham skittled for 61 and 66 on the same day|
|Kane isn´t a machine – Lamela defends misfiring Spurs star|
|Hazard left out of Chelsea squad for PAOK trip|
|Tiger feels close to ending drought after achieving Tour Championship goal|
|Leno in line for Arsenal chance in Europa League|
|Gazidis leaves Arsenal in good shape, insists Emery|
|Eagles bring back WR Matthews, place Wallace on IR|
|England include Stokes, Hales and uncapped seamer Stone in ODI squad|
|Suwon Bluewings 0 Jeonbuk Motors 3 (aet, 4-2 on penalties): Quarter-final comeback ends in spot-kick|
|Australia captain Paine ready to slog it out with Pakistan|
|Nadal pulls out of China Open & Shanghai Masters with knee injury|
|Ostapenko begins Korea Open defence with victory|
|Joshua v Povetkin: How Olympic super heavyweight champions have fared|
|Liverpool ´made a point´ with PSG victory - Gomez|
|Osaka wows Tokyo crowd on WTA return|
|Excited Povetkin arrives in England for Joshua showdown|
|Kovac patience with Sanches set to reap rewards|
|Kovac: Madrid strong without Ronaldo, Messi is the best|
|ATP suspends umpire Lahyani over Kyrgios ´pep talk´ at US Open|
|North and South Korea seek to co-host 2032 Olympics|
|Ampadu signs long-term Chelsea contract|
|Don´t blame Neymar, PSG players all guilty - Thiago Silva|
|Real Madrid seek to plug Ronaldo scoring gap – Champions League in Opta numbers|
|Brewers allow Cardinals to inch closer with loss to Reds|
|Manchester is still red – Depay ahead of Lyon´s clash with City|
|Orioles become first pro team to wear braille jerseys|
|Klopp hails ´brilliant´ Henderson|
|PSG attack lacked aggression, says Tuchel|
|Atletico Tucuman 0 Gremio 2: Libertadores holders draw first blood in QFs|
|Thomas plays down wrist worry|
|Rakitic wants more from Barcelona hat-trick hero Messi|
|My players aren´t s*** – Pochettino defends Spurs squad|
|Cubs reliever Morrow won´t return this season|
|Tebow expected to be back in Mets organisation next season|
|Inter can compete against anyone – Icardi revels in Champions League victory|
|Tuchel: PSG loss to Liverpool not logical or correct|
|Sturridge in best shape I´ve seen – Klopp|
|Milojevic celebrates ´fantastic´ occasion after Red Star´s 26-year wait|
|Rodrigo and Simeone salute Griezmann display|
|Seahawks DE Clark on Bears QB Trubisky: He´s nothing special|
|Carroll says Wilson has been ´over-trying a little bit´|
|Judge returns to Yankees´ starting lineup|
|Napoli boss Ancelotti takes aim at Red Star time wasting|
|Favre admits young Dortmund stars struggled in Bruges|
|Otavio would trade goal for Porto victory as he bemoans Schalke draw|
|Championship Review: Pacesetters Leeds crush Preston, Villa end five-game winless run|
|Neymar world-class but not a defender - Klopp says Liverpool targeted PSG star|
|Waiters injury update: Heat guard unlikely to be ready for start of season|
|Gojowczyk eliminates returning Tsonga in Metz|
|Liverpool enjoying best start in 57 years after PSG win|
|Galatasaray 3 Lokomotiv Moscow 0: Terim´s side make light work of Russians|
|Club Brugge 0 Borussia Dortmund 1: Super sub Pulisic scores late winner|
|Schalke 1 Porto 1: Fahrmann saves one penalty, but Otavio scores another|
|Red Star Belgrade 0 Napoli 0: Points shared as Italians fail to make possession pay|
|Liverpool 3 Paris Saint-Germain 2: Firmino strikes late as Reds edge five-goal thriller|
|Monaco 1 Atletico Madrid 2: Costa and Gimenez seal comfortable win|
|Chaos reigns in Serie B as league denies suspension claim|
|India secure Asia Cup victory despite valiant Hong Kong effort|
|Messi makes "extraordinary routine", says Valverde after Barca star surpasses Ronaldo|