NEIL Lennon last night admitted Celtic’s failure to qualify for the Champions League for the second season running could adversely affect his ability to strengthen his squad further in the transfer market. Lennon conceded the Scottish champions only had themselves to blame for their painful exit from Europe’s premier club competition after their 4-3 defeat at Parkhead to Romanian rivals CFR Cluj and 5-4 aggregate loss. The triple treble winners, who were knocked out in the third qualifying round by AEK Athens last year, now go into the Europa League play-off against either Sheriff Tiraspol of Moldova and AIK Stockholm of Sweden. Lennon is hoping to add more players to his squad before the summer window closes at the end of August and has been linked with right back Robert Gumny of Lech Poznan and left back Birger Meling of Rosenborg. However, the Northern Irishman, who is hoping to be handed a portion of the Scottish record £25 million fee Celtic received from Arsenal for Kieran Tierney last week, confessed the failure to reach the Champions League could mean they struggle to land their targets. Asked if the Cluj loss would affect his transfer budget, he said: “I’m sure it will, but that’s not at the forefront of my mind at the minute. We all wanted Champions League football and we have only ourselves to blame for not getting that.