Renault chief Cyril Abiteboul says the French manufacturer doesn't take any notice of what Red Bull team chief Christian Horner says about its engine anymore, and hasn't done so since 2015 when the two companies relationship first became strained. Red Bull has used Renault engines since 2007 and won the championship with them in 2010, 2011, 2013 and 2014. However the switch to V6-Hybrid engines hasn't been as successful and caused the two parties to fall out in 2015 which almost led to them splitting.  The issue was resolved and Red Bull continued to use Renault engines, but renamed them under sponsor Tag Heuer. But the strained relationship has continued to...
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