Brentford duo Neil Maupay and Ollie Watkins were both linked with moves to Middlesbrough in January.
We take a closer look at the ones who got away and how they've fared since - scroll down and flick through our gallery to find out.
The Frenchman has scored 20 Championship goals this season and attracted plenty of interest in January. However, after netting seven goals in five games, Maupay has now gone three games without scoring.
Boro were linked with a late move for the Poland international after Grosicki helped Hull move to the cusp of the play-offs. The Tigers have dropped off since then and look set for a mid-table finish.
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Grant was in red-hot form for League One Charlton and attracted interest from several clubs in higher divisions. Huddersfield eventually landed the 21-year-old, who has scored three Premier League goals since.
After recovering from a long-term knee injury, Vassell has returned to the Birmingham side this season. However, he has started just one league game this term.
The Brentford captain was instrumental during their victory over Boro earlier this month. The 27-year-old midfielder has missed just one league game this term and is under contract until the end of next season.
Recent reports suggested Boro are still interested in the QPR forward, along with fellow Championship side Leeds. Freeman has been a key player for Rangers despite their slide down the table in recent months.
Only Billy Sharp and Teemu Pukki have scored more Championship goals than the Birmingham striker this term. Adams has failed to find the net in his last five games though.
After turning down Boro to join Aston Villa on loan in the summer, Bolasie signed for Anderlecht on loan in January. The Everton wide-man has impressed in the Belgian first division, scoring four goals in seven appearances.
Boro were linked with an ambitious loan move for their former winger, who has struggled at Molineux in recent months. After a decent start, Traore has started just one of the last 10 Premier League fixtures.
Another pacey striker who was reported as a potential solution to Boro's lack of goals. Watkins, 23, has scored nine goals and provided eight assists this campaign but has stated on the bench in three of his last five games.
Like others on the list, Puncheon was linked with a move to Boro in the summer. The 32-year-old stayed at Crystal Palace but rarely featured for the Eagles. He moved to Huddersfield in January and has made seven appearances since.