Celtic manager Ange Postecoglou has had plenty of success in the transfer market in his relatively short time with the Scottish giants so far.

The likes of Cameron Carter-Vickers, Jota and Kyogo Furuhashi have all come through the door, since the Australian arrived, and thrived in Glasgow, becoming key players on the pitch.

Another Celtic boss who had his fair share of glory in transfer windows was Neil Lennon, who has had two separate spells in charge of the club.

During his first time in the dugout, the Northern Irishman brought in English striker Gary Hooper as one of his first signings. The attacker joined the club from Scunthorpe for £2.4m in the summer of 2010.

He subsequently went on to enjoy a phenomenal career with Celtic as he plundered 82 goals and provided 30 assists in 138 matches in all competitions. This included 63 strikes in 95 Premiership outings and seven goals across various European competitions.

The marksman, who midfielder Elliott Bennett once dubbed "clinical", scored 19 goals or more in all three of his seasons in the Scottish top-flight for the Hoops and was eventually sold to then-Premier League side Norwich City for a fee of £5m in the summer of 2013.

Whilst it appeared to be a huge loss at the time, given his fantastic record for the club, it turned out to be a blinder of a decision by Celtic and Lennon as his career failed to kick on at the top level.

Hooper only scored six goals in 32 Premier League matches for the Canaries as they were relegated down to the Championship, which shows that he was unable to replicate his goalscoring success in Scotland down in England.

He did produce 12 goals and six assists in 30 appearances as Norwich won promotion back to the top flight in the following campaign but did not do enough to convince Alex Neil that he was ready to play at the top level.

The ex-Celtic man only played twice in the Premier League at the start of 2015/16 before being shipped out on loan to Sheffield Wednesday and they have turned out to be his last outings in a major European league to date.

After an 89-game spell with the Owls, Hooper played for Kerala Blasters in India and Wellington Phoenix in Australia before joining Omonia Nikosia in Cyprus earlier this year, linking up with Lennon once again.

Hooper's career after leaving Celtic shows that they played a blinder by selling him for £5m as he was never able to kick on and become a regular goalscorer at the top level.