There are some players who take their time to bed into a new club and get familiar with the strange surroundings they find themselves faced with.
Then there is another type of player – one who is able to carry over good form wherever he goes, hitting the ground running and instantly endearing himself to his new club’s fans.
Didier Drogba did just that last night for Galatasaray, scoring with a brilliant header and setting up another in his first game for the Turkish club. Just a few weeks ago, Mario Balotelli scored twice on his debut for AC Milan, including a last-minute winning penalty.
So with that in mind, take a look at the best ever debut performances.
Sergio Aguero, Manchester City v Swansea
Most Manchester City fans believe that the £38 million the Citizens spent on Sergio Aguero was more than worth it; his one Premier League-winning goal against QPR last season means he has more than paid off his sizeable fee already.
But before then, the Argentinian from Atletico Madrid demonstrated his huge potential in a blue shirt by bagging a brace on debut in an electric 4-0 win over Swansea in 2011.
An easy first goal and a second long-range blast ensured City had a new hero, and the one they call ‘Kun’ started the season like he would end it. Watch here.
Wayne Rooney, Manchester United v Fenerbahce
Then just 18, Wayne Rooney had the world at his feet following a £27 million move from Everton. It didn’t take long for the heir to Paul Gascoigne’s throne to show just what he could do.
Having not kicked a football since announcing himself to the world at Euro 2004, all eyes were on Rooney going into Manchester United's home Champions League tie against Fenerbahce.
Rooney got his first goal for United after 17 minutes, before the second followed just over ten minutes later. The third, a brilliant free-kick after 54 minutes, was the pick of the lot. 6-2 was the final score, but the game will always be remembered for one reason, and one man. Watch here.
Jurgen Klinsmann, Tottenham v Sheffield Wednesday
Klinsmann arrived at Tottenham from Monaco amid much scepticism; what was a German international who had broken English hearts at the 1990 World Cup, and who had a reputation for being a diver, doing at White Hart Lane?
Soon the questions would fade away to be replaced by the roar of the crowd as Klinsmann grabbed a goal on his Tottenham debut, a 4-3 win over Sheffield Wednesday. The striker confirmed his new status as a White Hart Lane hero as he celebrated by launching into a self-deprecating dive in front of the cheering crowd. Watch here.
Jimmy Greaves, Chelsea v Tottenham
Jimmy Greaves didn’t just score on his debut for Chelsea aged just 17. He didn’t just score on his debut for Tottenham. He scored on every single debut he made for each of his eight clubs until his retirement in 1971. You can probably guess what he did on his England debut.
Alas, Greaves would tarnish his record by launching a comeback with Brentwood Town four years after retiring from the game and failing to score in his first game for the Essex-based club, but that doesn’t take away from his remarkable record of debut goals that is unlikely to ever be bettered.
Romario, Barcelona v Real Sociedad
The Brazilian legend is one of the most prolific goal scorers of all time and he began as he meant go on when he joined Barcelona in 1993.
Taking to European football like a duck to water Romario, who after his first season with the Catalan club would go on to guide Brazil to World Cup glory in America, hit a hat-trick against Real Socidad. Unsurprisingly, he would also go on to claim the ‘Pichichi Trophy’ as La Liga’s top goalscorer with 30 goals in 33 games that year. Watch here.