Complex sentence: Three weeks later Takeover Target contested the Group 1 July Cup at Newmarket Racecourse, finishing in seventh placing behind Fleeting Spirit, but sustained a career-ending injury when he cracked the cannon bone in his near hind leg.
Split into simpler sentences: Three weeks later, he contested the Group 1 July Cup at Newmarket Racecourse, finishing in seventh behind Fleeting Spirit. He sustained a career-ending injury when he cracked the cannon bone in his near hind leg.