Celtic's top scorer for the past three seasons, Englishman Gary Hooper, is on his way out of the club. Midfield enforcer Victor Wanyama has signed for Premier League side Southampton. So who will Celtic replace them with?
Hooper looks set to join Norwich City after the clubs agreed a fee with Hooper also completing a medical at Carrow Road. The Glasgow side now face the task of replacing him as they look to secure Champions League qualification.
Lennon has already targeted Artjovs Rudnevs of Hamburg, but the Latvian forward has made it clear that he is keen to stay with the Bundesliga side despite the prospect of Champions League football with Celtic.
A source of Rudnevs told Glasgow's Daily Record that "As soon as he was asked about leaving, he was clear in his intentions – he wants to stay."
Lennon may, therefore, be forced to look elsewhere unless Rudnevs can be persuaded. Elsewhere could be Wolverhampton Wanderers, where the Parkhead boss is reportedly keen on making a permanent move for striker Kevin Doyle after a failed attempt to bring him in on loan in January.
The Republic of Ireland player has scored 12 times in 53 games for his country and also has plenty of Premier League experience with both Reading and Wolves.
French side Evian's striker Saber Khelifa is also on Lennon's radar and the Celtic coach even went to see the Tunisian play last season. He scored an impressive 16 goals in Ligue 1 and with just a year left on his contract could be available for a low fee. Any of these three targets would be a decent replacement for Hooper, but Lennon also needs to find a midfield replacement for Victor Wanyama after his £12.5 million move to Southampton.
Little has been reported on the search for midfielders as of yet, but expect that to change should the Hoops make it past Elfsborg of Sweden in the next round of qualifiers. They would only have one more qualifying round to navigate and could certainly use that to attract players as the transfer window closes.
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