Cologne - The 2014/15 campaign may be just six games old, but that hasn’t stopped some summer signings from causing quite a splash so far this season. takes a look at five players who have already caught the eye since joining their new clubs in the summer transfer window…

Italian international Immobile arrived at Borussia Dortmund in the summer with something of a reputation after finishing last season as Serie A’s top scorer with 23 goals for Torino FC. After a teething period at the beginning of the campaign, he opened his account for BVB with a stunning solo effort against Arsenal FC in the Champions League and is now up and running in the league after netting against VfB Stuttgart on Matchday 5. With Dortmund struggling domestically, however, Immobile needs to continue that fine goalscoring form.

A Champions League winner with Chelsea FC in 2012, Kalou already seems at home in the Bundesliga. Tempted to join Hertha Berlin by the advice given to him from his Cote d’Ivoire team-mates and Germany’s brilliant performances at the FIFA World Cup, the 29-year-old is fast becoming a cult hero in the capital, and scored his first goal for the club in the 1-0 win over VfL Wolfsburg on Matchday 5. A fan of the city from the outset, Kalou and the Old Lady already look like a match made in heaven.

Eintracht Frankfurt recruited several attacking players in the summer, but Seferovic is no doubt the pick of the bunch. He scored the winner against SC Freiburg on the opening day of the season and further endeared himself to fans by bagging the equaliser in the 2-2 derby draw with 1. FSV Mainz 05 on Matchday 5. A full Swiss international, he has shown no signs of lethargy following the World Cup, at which he made four appearances to help his country reach the last 16.

In 2013/14, Hakan Calhanoglu scored 11 times for a Hamburger SV side that finished in the relegation play-off place. This term he is competing at the top of the table and in the Champions League at Bayer 04 Leverkusen, and his game has been elevated to a whole new level. He already has a goal for his new club - a trademark free-kick against SV Werder Bremen on Matchday 3 - as well as two assists, but has also helped to turn Bayer into one of Germany’s most exciting teams again. At just 20 years of age, his potential is frightening.

FC Bayern München have one of the most competitive squads in world football, but 32-year-old Alonso is already one of the first names on the team sheet. Thrust into the starting XI against FC Schalke 04 just a day after he signed for the club, Alonso has been peerless ever since, and despite missing the first game of the season has had more touches of the ball than any other player. He even set a new Bundesliga record on Matchday 6 by having 204 touches of the ball in the 2-0 win at 1. FC Köln.