 Complete the following phrase:  Higgins added a third UK Championship title in 2010 and claimed his fourth world title in 2011. He then experienced a slump in form, and between 2012 and 2014 only won the 2012 Shanghai Masters. He spoke frequently in this period about his struggles with confidence and consistency. However, in 2015, Higgins returned to winning ways, capturing three ranking titles. He reached three consecutive World Championship finals between 2017 and 2019, but was runner-up each time, losing to Selby in 